Originally Posted by
Fynlar
He might have just been bad in general, but it's worth pointing out that SMN is extremely disadvantaged with the adds in that fight. They're a DoT class. Their best burst damage (Fester) still relies on actually applying all three of their primary DoTs to the mob first. In situations where you have to burn down a bunch of scattered weak targets very quickly, SMN is probably the least optimal choice.
I had a run of that dungeon once with two SMNs as the DPS. The rest of the dungeon went fine. Once we got to this last boss though, there were many many wipes until we finally managed to win.