Its difficult, it stalled my boyfriend (tank) and I (sch) nearly a week before we decided to attempt it again; (mind we got gear upgrades and class skills during that time). the last boss is the one thats the challenge. Eorzea-source.com Brayfloxs Longstop does help a little to get you aware. Besides that, try to get a tank that has done it before...first attempt we wiped on the last boss 6-8 times before the party fell apart b/c outta time; second time we ran it with minimal issues. use food buffs, level to its cap (or past) will also help too.