Originally Posted by
Spiralphoenix
Do you mean 5 players in PvP gear? Depends on the gear. If it's 458 honor gear you'll probably have a hard time. If it's CP gear you should be fine assuming you reforge to raid hit/exp caps and get decent trinkets, as pvp power/resil takes nothing out of the budget. Also might want to have them research PvE playstyle if they haven't done it before as talents/glyphs/etc. may change quite a bit.
If you mean just 5 players who only PvP, still depends. I've played with PvP'ers who were strong in PvE as well, and PvP'ers who sucked at it. A lot of the difficulty in CM's is just knowing the instances through and through. Knowing what trash hits hard, knowing what to avoid, knowing small tricks that can gain you time, knowing what spells are very easily lethal (Holy Fire in the scarlet dungeons) and the names of the mobs that cast them (usually want to kill those first), etc. It's a much different playstyle than PvP but much more predictable and scripted of course. Once you get it down it's easily repeatable.