I can see a 5x lock team being alot of fun in pvp, good luck on your journey to 70.

What do you think about dropping one of the locks for an spriest? It seems like your team would still have the ability to work the same in pvp but you would gain misery+shadoweaving for a huge damage boost...and with mindflay getting a range buff in wotlk to match DLs range 4x dl + 1x mindfly is pretty nice for the 50% snare and blackout procs