I feel kinda guilty heh i haven't even trained backstab.
I guess I should at least talk about the bad parts, cause they do happen, and sometimes more often than I'd like.
My rotation is opener, hemo, finisher nearly always. Sometimes I dont get any opener or finisher so its just hemo till dead.
When shadowstepping with all 5 chars, server lag tends to make it work out right where the main will go first and the mob will do an insta-face to the main and the four other chars will end up behind the target. this results in 1x cheapshot and a quarter second later the amushes/ garrote come. Regardless, the cheapshot almost always happens, so it isnt always a huge problem. When it happens perfectly, the ambushes crit and its instadeath for the target (15% of the time. Expect to see more often as crit goes up).
Problems with 5x shadowstep:
Sometimes all chars end up on same side of the target resulting in no ambushes or garrote, just regular melee.
Sometimes when this happens (due to a /follow in my macro cause of melee hits stopping the follow) the main faces the target, but the 4 others then /face the main without doing any more damage. I counter this by walking through the target on the main to help keep the alts facing the target. sometimes its not possible tho due to the target being against a wall.