We ran a FoD last night, and I hope this will be a warning to others out there. Every toon that we had that used an AoE attack on more than a few mobs (1-2) crashed to desktop. We tried to have everyone AoE nuke the center, with the result that only the healer, an archer, and a dead person were left in game.
So, NCSoft, FoDs are undoable. Thanks. Everyone else, you've been warned. Don't AoE in the FoD.