Hey, so last night I went into Karazhan with one of the oddest group make ups ever. In no way did our group look ideal but we ended up killing everything except Nightbane and Netherspite (mostly due to time constraints). Group makeup was:
Our very first reset (well, the first two resets) we used this group and killed all but Netherspite and Nightbane. Happened to also be the server first for all of it.
Honestly, it's probably our smoothest group apart from R&J which we didn't fight and Nightbane which we'd need one of our 0 dwarf priests for.