despite what other guy said, i barely move around when in battle, except for when the mob dies.
sure at the first attack qyzen will be next to me but once he is attacking he does not move, so i only have to move behind the target ONCE. but, i digress.
I am a level 34 infiltration spec shadow. this is my first char. i have focused most of my talents on anything that can boost damage, and anything that boosts force regen. it is a total waste of force to open with shadow strike, even though i agree it is our best ability. i usually stealth, open with force breach, or project > force breach, and begin to use shadow strike any time i get the proc for half force cost. other than that, i stack two double strikes to get the proc for project, and use that. rinse and repeat. and i NEVER run out of force this way. and still bring down a group of mobs within seconds, qyzen tanking. i love qyzen.
i find force breach almost always crits on weak enemies, giving me an instant kill. so i usually target them first.
so summed up: open with force breach, use double strike, hit shadow strike on every proc, and project on every proc.