If u use the sub/assassin spec u use cripple/wound or w/e ur fighting u can change it..
I love the non dagger sub/assassination spec. some like the dagger spec up to the player.
Only thing i have to say i hate is lack of burst finisher.
27/0/44 but i think blizzard should do it like they done pallies dots make it where only our incapacitates wont break gouge and blind from our dots whether it be poisons or rupture or garrote.
U cant play around wit this spec I'll link it!
http://www.wowarmory.com/talent-calc.xml?cid=4&tal=30530010530210202000000000000000000000000000000000000005300230130302121050135031000
^^^^Hope i could help!