So I just hit 100 on my Rogue and I'm wondering whats the best pve spec atm? I leveled combat, but I'm not sure if it is all that great for pve atm. Any help/tips would be appreciated!
Pessimistic view: all specs are shit. Warlocks, Warriors, Mages will always beat you in PvE.
Optimistic view: there is no BEST spec. In order to play your class correctly you chose your spec for each fight depending on the mechanics and what your raid already has / still needs.
For single target -> Sub
For execute & two target cleave -> Assa
For aoe -> Combat
All specs are 'viable' so the only advice I can give you on your new lvl 100 rogue: play the spec you like the most.