Don't forget the dmg's I posted are 255 mp stated, which means i'd be pking with 3K hp and 600 ac. Aka spike thrust, or like 5x sword dance to kill me. U think a mage can 5 hit a warrior or 2 hit a sin?
Next: 8 man party, ofc mages rape. But higher staff dmg or not, the novas stay. So even if the staff dmg is highered or not, you'll keep getting novaed just as hard. When it comes down to the melee attack, the 42 skill, 6 mages spamming blade will only do like 1/4 of the dmg 6 warriors would be spamming and they got like 2x more hp. I really don't see how 350-400 staff dmg (which is only like 100 dmg extra than the normal staff dmg....) can be overpowered. I did the same amount of dmg in diez dcz, and there were still sins outminoring me without any problems, at lvl 59, shouldn't be a problem for a decent lvl 70 skill to outminor 350 staff dmg (with magicshield) , no?