The first post is what my current build is, and this is what I'm looking into after respec and hitting 50.
The slots are a bit chaotic in the end because I had more slots to use than I think I needed, yet when we get to the later powers I'm kinda getting short on slots. Too bad you can't skip using slots until you get to a level where you can actually use them.
Villain Plan by Mids' Villain Designer 1,30
http://www.honourableunited.org.uk/mhd.php
Frag Doll: Level 50 Technology Mastermind
Primary Power Set: Robotics
Secondary Power Set: Force Field
Power Pool: Teleportation
Power Pool: Leadership
Power Pool: Medicine
Power Pool: Fitness
Ancillary Pool: Mace Mastery
Villain Profile:
Level 1: Battle Drones -- Acc-I:30(A), Acc-I:30(3), Acc-I:30(3), Dmg-I:30(5), Dmg-I:30(7), Dmg-I:30(7)
Level 1: Force Bolt -- Acc-I:30(A), Range-I:30(5), Acc-I:30(40), Range-I:30(40)
Level 2: Deflection Shield -- DefBuff-I:30(A), DefBuff-I:30(9), DefBuff-I:30(9), EndRdx-I:30(11)
Level 4: Insulation Shield -- DefBuff-I:30(A), DefBuff-I:30(11), DefBuff-I:30(17), EndRdx-I:30(21)
Level 6: Equip Robot -- EndRdx-I:30(A), EndRdx-I:30(27)
Level 8: Recall Friend -- IntRdx-I:30(A), EndRdx-I:30(46)
Level 10: Assault -- EndRdx-I:30(A)
Level 12: Protector Bots -- Acc-I:30(A), Acc-I:30(13), Dmg-I:30(13), Dmg-I:30(15), Dmg-I:30(15), ToHitDeb-I:30(17)
Level 14: Teleport -- EndRdx-I:30(A), Range-I:30(23), EndRdx-I:30(23), Range-I:30(34), Range-I:30(34), EndRdx-I:30(43)
Level 16: Personal Force Field -- DefBuff-I:30(A), DefBuff-I:30(27), DefBuff-I:30(34), EndRdx-I:30(40)
Level 18: Tactics -- EndRdx-I:30(A), ToHit-I:30(19), ToHit-I:30(19), ToHit-I:30(21)
Level 20: Aid Other -- Heal-I:30(A), Heal-I:30(25), Heal-I:30(25)
Level 22: Swift -- Run-I:30(A)
Level 24: Dispersion Bubble -- DefBuff-I:30(A), EndRdx-I:30(29), DefBuff-I:30(29), DefBuff-I:30(33), EndRdx-I:30(39), EndRdx-I:30(43)
Level 26: Assault Bot -- Acc-I:30(A), Dmg-I:30(31), Dmg-I:30(31), Dmg-I:30(31), Acc-I:30(37)
Level 28: Teleport Foe -- Acc-I:30(A), Acc-I:30(36), Range-I:30(46), Range-I:30(46)
Level 30: Health -- Heal-I:30(A), Heal-I:30(37), Heal-I:30(37)
Level 32: Upgrade Robot -- EndRdx-I:30(A), EndRdx-I:30(33), EndRdx-I:30(33)
Level 35: Stamina -- EndMod-I:30(A), EndMod-I:30(36), EndMod-I:30(36)
Level 38: Force Bubble -- EndRdx-I:30(A), EndRdx-I:30(39), EndRdx-I:30(39)
Level 41: Web Envelope -- Acc-I:30(A), Acc-I:30(42), Immob-I:30(42), Immob-I:30(42), Immob-I:30(43)
Level 44: Scorpion Shield -- EndRdx-I:30(A), DefBuff-I:30(45), DefBuff-I:30(45), DefBuff-I:30(45)
Level 47: Mace Beam Volley -- Acc-I:30(A), Dmg-I:30(48), Dmg-I:30(48), Dmg-I:30(48)
Level 49: Web Cocoon -- Acc-I:30(A), Hold-I:30(50), Hold-I:30(50), Hold-I:30(50)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Supremacy
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</pre><hr />
Looks pretty solid. Maybe a little to much slotting in Force Bolt, 2 Acc is all that's really needed. I'd suggest replacing all but one of the EndRedux slots in both Equip and Upgrade with Recharge ones unless you are ok with waiting for them, they take aaaages.
Unless you're expecting to use Recall Friend in combat alot I'd suggest only slotting 1 range.
The last slot in Protector Bots may serve you better as a Heal or DefBuff.
Protector Bots could do with an End Red, they eat the blue bar like crazy when equiped and upgraded!! 
Yes I noticed that about the Protector bots, suddenly spawning those seeker drones and poof gone is their end! I had no idea slotting them with end would help.
The force bolt got some attention when I had slots to spare and no idea where to put them, so it isn't there for necessity other than I had to put them somewhere. If I remove them, I'd have no idea where to put them instead. So if I remove the two from force bolt, where should I put them instead?
Good advice gotten already here - I'd perhaps drop Mace beam Volley and pop Aid Self in instead.
Also, TP Foe is far too situational for a MM - you're better pulling with a full volley of bot fire. I'd replace that for Repair (a full, uninterruptable heal is a life saver for when your Assault Bot is getting battered!)
Not sure why you went for Stamina - I understand some people like the safety blanket though! A couple of CAB's see me through most fights and more space for more important powers like Detention Field and maybe an attack from your Primary (the single-targets are quite good, ignore their bad press!)
I had detention field but I found I never used it.
Right now I LOVE TP foe. It doesn't always work but I use it often in missions where mobs are scattered in an disadvantage way (either too close to others or some are up and others below which really messes up the AI).
I also have aid self in my current build, but was left with whatever power do I need to choose now ... so I took shift very late which made me rethink what I did and get stamina rather than detention/aid self. I choose them considering what I thought was useful to me.
The thing I hate about detention is that as long as the power is enabled I can't harm the subject detained.
I play my MM with my dark/dark who has fearsome stare and petrifying gaze. It works well and I still get to shoot at them.
I'll keep the mace beam volley vs aid self in mind. I did find it easy to use and even with the pps I can get hurt. After I respec once I'll still have one respec left which I may use when I hit 50 and have experienced the powers (though I'm already warned that the patron powers are generally quite underwhelming - so I probably just take them for the "cool" factor). Only too bad that MM's don't get the pet.
Oh I missed about the attacks, but I have had them in the past and found that the damage I did was terrible compared to the violence unleashed by my droids. The only exception was force bolt/blast, which is always handy to use. they can't hurt me when they're on their [censored].
I might try a weaponskill/aid self instead of swift/etc. To be honest, I didn't find that I needed stamina - it was merely a point of filling things up when something didn't pop up that I felt "Oh, I must have that power". Up to level 35 I've been doing without stamina and as you mentioned, cab's do the trick just as well.
I remember having dual pistol on my thugs/dark and I loved it. (again it just looked cool, I didn't care about dmg persé with her)
Here's the updated version using the advise given by you guys.
Villain Plan by Mids' Villain Designer 1,30
http://www.honourableunited.org.uk/mhd.php
Frag Doll: Level 50 Technology Mastermind
Primary Power Set: Robotics
Secondary Power Set: Force Field
Power Pool: Teleportation
Power Pool: Leadership
Power Pool: Medicine
Ancillary Pool: Mace Mastery
Villain Profile:
Level 1: Battle Drones -- Acc-I:30(A), Acc-I:30(3), Acc-I:30(3), Dmg-I:30(5), Dmg-I:30(7), Dmg-I:30(7)
Level 1: Force Bolt -- Acc-I:30(A), Acc-I:30(5)
Level 2: Deflection Shield -- DefBuff-I:30(A), DefBuff-I:30(9), DefBuff-I:30(9), EndRdx-I:30(11)
Level 4: Insulation Shield -- DefBuff-I:30(A), DefBuff-I:30(11), DefBuff-I:30(17), EndRdx-I:30(21)
Level 6: Equip Robot -- EndRdx-I:30(A), RechRdx-I:30(27)
Level 8: Recall Friend -- Range-I:30(A)
Level 10: Assault -- EndRdx-I:30(A)
Level 12: Protector Bots -- Acc-I:30(A), Acc-I:30(13), Dmg-I:30(13), Dmg-I:30(15), Dmg-I:30(15), EndRdx-I:30(17)
Level 14: Teleport -- EndRdx-I:30(A), Range-I:30(23), EndRdx-I:30(23), Range-I:30(34), Range-I:30(34), EndRdx-I:30(43)
Level 16: Personal Force Field -- DefBuff-I:30(A), DefBuff-I:30(27), DefBuff-I:30(34), EndRdx-I:30(40)
Level 18: Tactics -- EndRdx-I:30(A), ToHit-I:30(19), ToHit-I:30(19), ToHit-I:30(21)
Level 20: Aid Other -- Heal-I:30(A), Heal-I:30(25), Heal-I:30(25)
Level 22: Aid Self -- Heal-I:30(A), Heal-I:30(33), Heal-I:30(37)
Level 24: Dispersion Bubble -- DefBuff-I:30(A), EndRdx-I:30(29), DefBuff-I:30(29), DefBuff-I:30(33), EndRdx-I:30(39), EndRdx-I:30(43)
Level 26: Assault Bot -- Acc-I:30(A), Dmg-I:30(31), Dmg-I:30(31), Dmg-I:30(31), Acc-I:30(37)
Level 28: Teleport Foe -- Acc-I:30(A), Acc-I:30(36), Range-I:30(46), Range-I:30(46), RechRdx-I:30(46)
Level 30: Repair -- RechRdx-I:30(A), RechRdx-I:30(37)
Level 32: Upgrade Robot -- EndRdx-I:30(A), RechRdx-I:30(33)
Level 35: Pulse Rifle Burst -- Acc-I:30(A), Acc-I:30(36), Dmg-I:30(36), Dmg-I:30(40), Dmg-I:30(40)
Level 38: Force Bubble -- EndRdx-I:30(A), EndRdx-I:30(39), EndRdx-I:30(39)
Level 41: Web Envelope -- Acc-I:30(A), Acc-I:30(42), Immob-I:30(42), Immob-I:30(42), Immob-I:30(43)
Level 44: Scorpion Shield -- EndRdx-I:30(A), DefBuff-I:30(45), DefBuff-I:30(45), DefBuff-I:30(45)
Level 47: Mace Beam Volley -- Acc-I:30(A), Dmg-I:30(48), Dmg-I:30(48), Dmg-I:30(48)
Level 49: Web Cocoon -- Acc-I:30(A), Hold-I:30(50), Hold-I:30(50), Hold-I:30(50)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Run-I:30(A)
Level 2: Rest -- RechRdx-I:30(A)
Level 1: Supremacy
<font class="small">Code:[/color]<hr /><pre>| Copy & Paste this data chunk into Mids' Hero Designer to view the build |
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Your build is very similar to mine (bar travel and blasts) and should work pretty well, altho: There is a much more effective way of slotting the Protector bots and its not overly expensive...I have mine slotted with (and you can thank Maelwys for this) Blood Mandate - Acc/Dam/End, Blood Mandate - Dam, Sovereign Rgt - Acc/Dam/End ,Sovereign Rgt - Acc/Dam, Common IO - Defence Buff, Common IO - Defence Buff (all at lvl40s) and that gives me Acc 62.73%, Dam 95.20%, Def 45.76% and End 38.60%. That give the protector bots bubble around 10% Defence thats loverly your other bubbles.
If you can afford it, the Procs from the pet sets are quite awesome too...i'm at the point where I don't even use Deflection/Insulation shields on my pets till I reach a Boss/EB/AV.
The only other points are:
With tactics I only have 2 Acc in Battle Drones and 1 Acc in Assault Bot.
Try and get some recharges in Aid Other, possibly an Interupt reduction too.
I'd swap the defence in PFF for recharges and drop the last slot, you'll only use it tough zones for travel and as an escape power...grants 67% defence to all which is enough to squeeze a heal or two.
This by no-means what you should do, its just what i've done differently.
That looks like a solid build. All the bases seem to be covered, everything that wants slots has them, powers are well chosen. It will fit your playstyle well. Now all that's left is to make a set IO build.
Like Chin said, using a few commodity set IOs to max out damage, accuracy and endurance in 4 or so slots lets you use other slots for the odd Proc or whatever you want to put in. You'll probably find this better than slotting for pure set bonuses.
Mace Beam Volley and Web Cocoon might want a bit more Accuracy in them, especially Web Cocoon, but you can cross that bridge when you come to use set IOs.
Necrobond - 50 BS/Inv Scrapper made in I1
Rickar - 50 Bots/FF Mastermind
Anti-Muon - 42 Warshade
Ivory Sicarius - 45 Crab Spider
Aber ja, nat�rlich Hans nass ist, er steht unter einem Wasserfall.
As an aside - ignore EndRdx for Assault Bot and Battle Drones as they don't really use any even with the final upgrade applied. Only Protector Bots need any EndRdx 
I'm currently at a point that things start to confuse me. There are some things in the build that I can do without and perhaps put something else there instead.
C4K.$RSY/_0ICN2TR?8F3*!H3:'G"G(#`:3@[!#-'P)33VHQY9F@'3J!E@+XZ!/HVQ
I do have a few unused respecs left so what are the things I should change? I took detention field because I didn't know what else, swift is there for the same reason as is aid self (though that's not really a bad choice persé). I'm thinking about the idea of trying to get stamina and drop detention/aid self. The equip/upgrade really take up end, but it's only done once so I'm still uncertain. If not that, then what other powers can I benefit from.
Villain Plan by Mids' Villain Designer 1,30
http://www.honourableunited.org.uk/mhd.php
Frag Doll: Level 36 Technology Mastermind
Primary Power Set: Robotics
Secondary Power Set: Force Field
Power Pool: Teleportation
Power Pool: Leadership
Power Pool: Medicine
Power Pool: Fitness
Villain Profile:
Level 1: Battle Drones -- Acc-I:30(A), Acc-I:30(3), Acc-I:30(3), Dmg-I:30(5), Dmg-I:30(7), Dmg-I:30(7)
Level 1: Force Bolt -- Acc-I:30(A), Range-I:30(5)
Level 2: Deflection Shield -- DefBuff-I:30(A), DefBuff-I:30(9), DefBuff-I:30(9), EndRdx-I:30(11)
Level 4: Insulation Shield -- DefBuff-I:30(A), DefBuff-I:30(11), DefBuff-I:30(17), EndRdx-I:30(21)
Level 6: Equip Robot -- EndRdx-I:30(A), EndRdx-I:30(27)
Level 8: Recall Friend -- IntRdx-I:30(A)
Level 10: Assault -- EndRdx-I:30(A)
Level 12: Protector Bots -- Acc-I:30(A), Acc-I:30(13), Dmg-I:30(13), Dmg-I:30(15), Dmg-I:30(15), ToHitDeb-I:30(17)
Level 14: Teleport -- EndRdx-I:30(A), Range-I:30(23), EndRdx-I:30(23), Range-I:30(34), Range-I:30(34)
Level 16: Personal Force Field -- DefBuff-I:30(A), DefBuff-I:30(27), DefBuff-I:30(34)
Level 18: Tactics -- EndRdx-I:30(A), ToHit-I:30(19), ToHit-I:30(19), ToHit-I:30(21)
Level 20: Aid Other -- Heal-I:30(A), Heal-I:30(25), Heal-I:30(25)
Level 22: Aid Self -- Heal-I:30(A)
Level 24: Dispersion Bubble -- DefBuff-I:30(A), EndRdx-I:30(29), DefBuff-I:30(29), DefBuff-I:30(33)
Level 26: Assault Bot -- Acc-I:30(A), Dmg-I:30(31), Dmg-I:30(31), Dmg-I:30(31)
Level 28: Teleport Foe -- Acc-I:30(A)
Level 30: Detention Field -- EndRdx-I:30(A)
Level 32: Upgrade Robot -- EndRdx-I:30(A), EndRdx-I:30(33), EndRdx-I:30(33)
Level 35: Swift -- Run-I:30(A)
Level 38: [Empty]
Level 41: [Empty]
Level 44: [Empty]
Level 47: [Empty]
Level 49: [Empty]
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Supremacy
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</pre><hr />
I'll post a 50 build in a few, where