Things to know:
1) The mobs anhero at low life, if you don't have a usable elementalist with a decent level FATMOS, HG your frontlines. The mobs are all melee, and i think they're all sword. A prophet with maxed shattered sword will greatly help for those that kill slow.
2) They hit really, really, really, really ferking hard. I'd say just about... uh... everyone on the guild roster, is going to take it with no lube. Beer is a necessity not an option, if you have no beerpots/licence, don't bother coming.
3) It's an ind formation, so you only get 5 merc+main.