I've found guerilla quite useful thus far. With stealth costing just 1 ap coupled with the new scoundrel skills that don't break stealth, I go in and out of stealth each round of combat and the extra 50% dmg helps me one shot enemies.
Backstab, warlords, guerilla, pawn, then maybe speed creeper, but I haven't felt that last one necessary with the extra movement from scoundrel.
All in all I've found scoundrel much more rewarding than in the enhanced edition.
