Equip robot is fine with one EndRdx, upgrade with 3 rech 1/2 EndRdx, stick those slots in seeker drones, acid mortar and tactics.
Agree with MaX.
Also you can drop some of the end reds in repair. You should also look at putting an end red in protector bots as then run out of end quickly post lvl 32. I have played around a lot with my prot bots slotting and currently running 1 Acc, 1 End Red, 3 Heal to get the healing badges so really with prot bots its a matter of taste but they do need an end red after lvl 32.
After 32 Prot Bots do well with a disorient duration too. Means their little seeker drone things can really get into the action. 
My advice:
Drop:
Triage Beacon if you can, it's really not worth it for either the power or the slots.
Drop:
Seeker Drones - you get these for free when you use the L32 Upgrade on Protector Bots.
Take:
Poison Trap should be your very best friend - drop one in the middle of a Longbow mob or pull them into it and watch them choke helplessly as your bots grind them down.
The -Regen component is also hugely useful when fighting Elite Bosses and AVs - if they can't regenerate, you'll have a much easier time crushing them.
Switch:
Exchange your CJ and SJ for Teleport, taking TP Foe, Teleport, and Recall Friend. Then take Trip Mine at 35, giving you access to the wonderful world of telemining (set up pile of mines, TP foe enemy on top, one instant death).
Recall Friend is also great for retrieving lost pets and moving your Acid Mortar about, extending its useful life.
Is it time for the dance of joy yet?
Just wondered if anyone could give me advice on my Robo/Traps MM build? And yes, I am going Stamina-less:
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Exported from Ver: 1.7.5.0 of the CoH_CoV Character Builder
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Name: Cyberskull
Level: 41
Archetype: Mastermind
Primary: Robotics
Secondary: Traps
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01) --> Battle Drones==> Dmg(1)Dmg(3)Dmg(3)Acc(5)Acc(5)Acc(9)
01) --> Web Grenade==> Immob(1)
02) --> Pulse Rifle Burst==> Dmg(2)Dmg(36)
04) --> Triage Beacon==> Heal(4)Heal(11)Heal(11)Rechg(23)Rechg(25)Rechg(25)
06) --> Equip Robot==> Rechg(6)Rechg(7)Rechg(7)EndRdx(9)EndRdx(19)EndRdx(36)
08) --> Assault==> EndRdx(8)
10) --> Combat Jumping==> Jump(10)
12) --> Protector Bots==> Dmg(12)Dmg(13)Acc(13)Acc(17)Heal(17)Heal(19)
14) --> Super Jump==> Jump(14)Jump(15)Jump(15)
16) --> Force Field Generator==> DefBuf(16)DefBuf(21)DefBuf(21)
18) --> Repair==> Rechg(18)Rechg(36)Rechg(37)EndRdx(37)EndRdx(37)
20) --> Grant Invisibility==> EndRdx(20)
22) --> Acid Mortar==> DefDeBuf(22)DefDeBuf(23)
24) --> Invisibility==> EndRdx(24)
26) --> Assault Bot==> Dmg(26)Dmg(27)Dmg(27)Acc(29)Acc(29)Acc(31)
28) --> Seeker Drones==> Acc(28)DisDur(31)Dmg(39)
30) --> Hasten==> Rechg(30)Rechg(31)Rechg(34)
32) --> Upgrade Robot==> Rechg(32)Rechg(33)Rechg(33)EndRdx(33)EndRdx(34)EndRdx(34)
35) --> Tactics==> EndRdx(35)
38) --> Caltrops==> Slow(38)
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01) --> Power Slide==> Run(1)
01) --> Power Quick==> Run(1)
01) --> Sprint==> Run(1)
01) --> Brawl==> Dmg(1)
01) --> Supremacy==> Empty(1)
02) --> Rest==> Rechg(2)
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