Valkry has a WPvP team of 5 rogues right now.
https://www.dual-boxing.com/threads/...-world-PVP-110

If you need a healer, shroud of concealment on round robin would help a bit with stealth if you went with a non-druid healer. If you're alliance then you could go night elf disc priest or mistweaver monk for the their stealth racial.

I know arena is not WPvP but if you go by the arena class distribution rankings you see Disc Priest, Ass. Rogue, and Mistweaver monk are in the majority of the teams. I bet any 5 rogue or 4 rogue 1 healer would kick some serious butt.

If I were making a team I would go 5 rogues if horde, or as alliance 4 rogues 1 NE Disc Priest or NE Mistweaver monk.