Man, finding multibox advice is tough when you don't run shamans.

My pally + 3 locks + priest team hasn't gotten past Kelsereth yet at 70, in mostly BC crafted epics and BOP blues. The trash is extremely easy and pretty fun (any time I get to wipe three mana bars on Seed of Corruption, you can bet I'll be giggling softly to myself), but the boss is just a beast. Once I figured out how basically to fight him, with shadow resistance aura and buffs and a macro to nuke the Ice Tombs, I got him as far ... oh, 1/3 health. Not even close.

I'm trying to keep in mind that sometimes it only takes one level, or one additional piece of +resistance gear to deal with a tricky boss! Any non-shaman advice would be great though.