Thinking about starting to PUG VoA with my 5 guys, hopefully 25 man since I hardly need any of the rewards from 10 man. I was thinking I could either MT or OT (or just switch to dps since I have some DPS gear) - any hints on making this possible? As far as the tricks he uses on DPS, is it good enough to just drop 4x healing stream totems and a nature resistance totem and ignore his damage? Do I need to spread my shamans out? How far?

Any tips would be appreciated, since I don't want to make a fool of myself and never get invited back.