This topic could be a good start.
Just started an AR / Dev myself, so many things to screw up! So many ways to gimp! I'm amazed! 
Apparently so.
Here's Emily's final (respec) build...
01 Slug
01 Web Grenade
02 Buckshot
04 Caltrops
06 Taser
08 Swift
10 Targeting Drone
12 Sniper Rifle
14 Combat Jumping
16 Super Jump
18 Health
20 Stamina
22 Cloaking Device
24 Flamethrower
26 Beanbag
28 Trip Mine
30 Teleport Foe
32 Full Auto
35 Hasten
38 Acrobatics
41 Body Armor
44 Cryo Freeze Ray
47 LRM Rocket
49 Burst
There are many different ways to mix up your AR/Devices pot, but here's my 2 inf.
BEST POWERS:
Trip Mine - combine two of these with Teleport Foe for the safest (if slowest) way of disposing of Malta Sappers, CoT Earth Mages, Stalkers and other annoyances. Also good for enclosed spaces like sewers, doorways, and anywhere you can get the enemy down to a choke point. Pile up enough and you can take out almost anything.
Cloaking Device - all the fun of Invisibility in one easy to use power.
Buckshot - much maligned but a regular lifesaver as an "arrgh get away" knockback power.
"PROBLEM" (not necessarily bad) POWERS:
Time Bomb - much trickier and slower to use than the regular Trip Mine and the higher level of damage doesn't make up for it. By the time one explodes, you could have set up three regular mines and pulled or TP Foed the mob onto them.
M30 Grenade - quite high aggro and quite high END use plus knockback. May or may not be to your taste.
Ignite - Creates a static patch of flame. Useful for blocking things like stairs, doorways, and other things, but Caltrops will do the job too. Also has a fear component that will scatter carefully herded mobs, so not the best. Flamethrower has better damage and is much more useful.
GENERAL TIPS:
Slug - slot 1 acc, 3 dam, 2 range - gives you almost Snipe range with no interrupt.
Burst - very weak damage but useful to have something when you're low on END (and you will be). If you have spare slots, slot for DEF debuff.
Is it time for the dance of joy yet?
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Ignite - Creates a static patch of flame. Useful for blocking things like stairs, doorways, and other things, but Caltrops will do the job too. Also has a fear component that will scatter carefully herded mobs, so not the best. Flamethrower has better damage and is much more useful.
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Been trying to think of ways to make my AR/dev be not-gimped, and it's tricky - Can Ignite not be used with Web grenade?
DON'T eat muffins while I'm developing you.
Pants! Turkey Magnates! A man in a box! Rogue AI! Come one, come all, to arc ID 10107 - It's [i]'Not as long as some other arcs'[/i]!
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Been trying to think of ways to make my AR/dev be not-gimped, and it's tricky - Can Ignite not be used with Web grenade?
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Yes it can and I find it works very nicely. I solo mostly with my AR/DEV doing those Firebase missions and I find its an excellent way of taking out Bosses after a healthy application of Taser + Beanbag.
If you are on a large team I tend to find that while you have taken your time to immob and stun someone, a team mate has already made him eat dirt. Its still useful for taking on AV's though except infernal, as most of them don't seem that difficult to immobilise.
Weavster, how much would you say you depended on Fitness? I'm quite surprised at the damage output so far I can do and can easily keep running through an even level mission without pausing (using inspirations, of course).
I was thinking that combining the knockback powers would be enough to let me tackle enemies at my own pace...
I don't have the xp of the OP, of course, but at level 19 I'm hankering for fitness. I dropped the AoE's with the freespec, simply because they were such a huge end drain, and I'm still finding I wheeze after each and every mob.
DON'T eat muffins while I'm developing you.
Pants! Turkey Magnates! A man in a box! Rogue AI! Come one, come all, to arc ID 10107 - It's [i]'Not as long as some other arcs'[/i]!
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Weavster, how much would you say you depended on Fitness? I'm quite surprised at the damage output so far I can do and can easily keep running through an even level mission without pausing (using inspirations, of course).
I was thinking that combining the knockback powers would be enough to let me tackle enemies at my own pace...
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"Weavster"...? New one on me. It's "Dreamer" or "DW" to friends, Frazz-Dawg.
Stamina is sadly pretty essential, particularly with END-hungry weapons such as M30 (if you take it) Flamethrower and Full Auto. Not to mention Cloaking Device and Targeting Drone toggles. (I rarely turn either off these days...)
What you take to get there is up to you, but I always get Health as a matter of course.
Knockback can be useful but I wouldn't count on it to save your skin. Also be wary of using too many Knockback powers around herder-build Tanks (they're neat freaks, bless 'em, don't like things going everywhere).
BTW - if you really want to have a Commander Harris combat build, consider an AR/Energy.
You lose TD, CD and those lovely mines, but Build Up, Boost Range, and Power Boost can have you unleashing great damage over huge areas, adds a very reliable knockback power (jim-jamYAHA!) or two, and turns you from a Ghost Recon commando type into a guns-n-fists classic pulp hero. It's actually very workable...
Is it time for the dance of joy yet?
[ QUOTE ]
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Weavster, how much would you say you depended on Fitness? I'm quite surprised at the damage output so far I can do and can easily keep running through an even level mission without pausing (using inspirations, of course).
I was thinking that combining the knockback powers would be enough to let me tackle enemies at my own pace...
[/ QUOTE ]
"Weavster"...? New one on me. It's "Dreamer" or "DW" to friends, Frazz-Dawg.
Stamina is sadly pretty essential, particularly with END-hungry weapons such as M30 (if you take it) Flamethrower and Full Auto. Not to mention Cloaking Device and Targeting Drone toggles. (I rarely turn either off these days...)
What you take to get there is up to you, but I always get Health as a matter of course.
Knockback can be useful but I wouldn't count on it to save your skin. Also be wary of using too many Knockback powers around herder-build Tanks (they're neat freaks, bless 'em, don't like things going everywhere).
BTW - if you really want to have a Commander Harris combat build, consider an AR/Energy.
You lose TD, CD and those lovely mines, but Build Up, Boost Range, and Power Boost can have you unleashing great damage over huge areas, adds a very reliable knockback power (jim-jamYAHA!) or two, and turns you from a Ghost Recon commando type into a guns-n-fists classic pulp hero. It's actually very workable...
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Naaaaaaaah, he's an army mascot, but he's likely to get Jump Kick and I'm going to slot Buckshot with knockback, hehe, so good trotting up and doing the battlecry then slamming a shotgun blast in their faces.
Never have liked the look of Energy, /Devices also looks 100x more evil too, and a lot of things in the AR / Dev mixup will send a lot flying around anyway. M30 grenade, HOY!!
Fitness shouldn't be too much of a problem to get in, and it's likely to end up being a FoTM build buy meh, it'll still rawk anyway.
Oh yeah, I think Weavster came from.. whathisname, Dark Weaver, a stalker on Defiant. Not seen him in game or on the forums recently though.
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Ignite - Creates a static patch of flame. Useful for blocking things like stairs, doorways, and other things, but Caltrops will do the job too. Also has a fear component that will scatter carefully herded mobs, so not the best. Flamethrower has better damage and is much more useful.
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Ignite AND Caltrops is what you want. Grab a bunch of bad guys, drop your 'trops on them and then show them the light in the form of superheated petrochemical gel courtesy of Ignite. And then Flamethrower the remains.
Plus, Ignite recharges so fast you can lay another patch on the screaming, burning survivors if you want to be even less heroic about it.
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Ignite - Creates a static patch of flame. Useful for blocking things like stairs, doorways, and other things, but Caltrops will do the job too. Also has a fear component that will scatter carefully herded mobs, so not the best. Flamethrower has better damage and is much more useful.
[/ QUOTE ]
Ignite AND Caltrops is what you want. Grab a bunch of bad guys, drop your 'trops on them and then show them the light in the form of superheated petrochemical gel courtesy of Ignite. And then Flamethrower the remains.
Plus, Ignite recharges so fast you can lay another patch on the screaming, burning survivors if you want to be even less heroic about it.
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Heh, you've sold the power for me there 
OK, that can work, but my personal opinion after having stuck with Ignite for 20 levels is to get something a bit more universally useful with a bit of range between you and the lightly grilled angry mobs
There's no really bad powers in AR, it's just one of two I didn't like out of the set and rarely used.
One thing Ignite did come in handy as is a personal "fire shield" - lay it down where you're standing to repel anything that wants to melee you. (Fireproof underwear advised.)
Is it time for the dance of joy yet?
Nah, Harris told me that napalm is good for your digestion
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Nah, Harris told me that napalm is good for your digestion
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As long as you don't enjoy a good cigar after your meal 
looking for a viable AR/dev build are there any out there?