Anyone?

Answer's in this thread mate :

http://www.swtor.com/community/showthread.php?t=427933

yeah basically we ended up, for infiltration, that there are 2 viable ways:

0crit rating, power augments

25% crit chance, willpower augments

(buffed/stimmed)

full surge

25% crit chance is for a more sustained dmg for arenas, because you can't abuse Force potency mayn times..insted normal wzs you can go 0crit rating and go to FULL POWER using Force potency as much u can.

I prefer 25% crit chance btw, you hit still very hard. not more than 12k i think but u crit a bit more.

For balance..actually i still don't know..some players say 30%crit chance..some others 0crit rating..I just know I'm playing now at ~30% and doing good..