30% damage against bosses question

Your best bet with lv 127 items is to get these stats:

12%/9%/9% w.att / m.att / Total damage

The + 30% damage on bosses is only added to skills which is very small compaired to % att & total damage.

Total damage is added on top of your end damage after crits and skills. So +30% total damage is great to have if you hit 100k since it'd add 30k damage.

% att is also great since it adds a % of your total attack, so if you have about 200w.att total, you could get about 60 extra w.att if you have 12/9/9, and then some if you used an apple.

..........For weapons, the boss damage is best, + % total damage. +% w/m att is only good as a temporary use when upgrading.