eat yag drinks and rolanberry pie. buff up, then rest up... whm and blm stay out of beetles aga spells...whm elemental seal + sleep Pilwiz while blm casts barstonra then fight begins. water 2 works well dont overnuke and melee with provoke attacks bison. eventually Pilwiz will wake up and blm elemental seal sleep him again. Macro works great for this. Bison should be dead before Philwiz wakes up... if sytill asleep use the time to rest up.... thats it...
Id recommend some hi potions for melee... but all in all the fight is pretty easy.... hold record on pheonix server done it a few times no worries