Talk with Morganti, he's the one who ran 5x SPriests. Also think he subbed one for Holy/Disc.

All in all BG he was fucking dominant.
Arenas your glass pea shooters and usually end up on 0-5 losses.
Heroics as Furs said you'll dirt nap more than I did in my entire 8 years of UO combined on 4 accounts.
Normal Runs you might be able to pull off with some practice and gimmicks.

If your just planning on doing BG's / Dailies / World PvP this would be an AWESOME group imo. Anything beyond... GL & HF.