[quote name='kylerg']What are some good Infiltrator builds for ME2?[/QUOTE]I prefer:
Heavy Disruptor Ammo - 4
Cryo Ammo - 0
Assassination Cloak - 4
Incineration Blast - 4
AI Hacking - 1
Assassin - 4
Tungsten Ammo - 4
Reasoning: Heavy Disruptor Ammo (+60% damage against synthetics or
Shields) + Tungsten Ammo (+70% damage against
Armor and
Health) give you superior damage against 99% of the enemies you will encounter throughout the game. I prefer the increased weapon damage, longer Sniper Slowdown duration, and increased power damage of the Assassin passive ability. Also, I think Assassination Cloak goes hand-in-hand with the Assassin specialization. Incineration Blast is for crowd control (Husks, Varren) and the one extra point into AI Hacking is much more useful than one point into Cryo Ammo.
[quote name='The Crotch']For infiltrators...
Step 1: Take the widow.
Step 2: RAAAAAAAAAAAAH!
Step 3: Hey, when did everyone die?
Or
this.
Incidentally, if you take the widow as a soldier, Xecutioner's advice re: bonus power isn't quite applicable. Your primary weapon is a one-hit kill on most targets, so armour-piercing rounds aren't quite as useful as they'd normally be (though I did still use them at one point).[/QUOTE]To supplement this: AP rounds still come in handy for your backup weapons (Heavy Pistol and SMG) which you may/may not use - depending on how much ammo you have at any given time. It's nice to have a passive ability as your bonus, though, so you're not wasting precious cooldown for the Cloak or Incineration Blast.