Lets face the truth.. to kill those suckers (except D.Valefor D.Ifrit D.Shiva and D. Ixion wich are faerly EASY !) you GOTTA have 255 strenght 255 acuracy and 255 agility.. plus Auto life plus good armour end. But i didnt beat Penence with ALL stats at 255 and little over 30000 hp..Used Zanmato.. 135 hours of this game non stop makes me sick, and i had enough ;]