[Kameron8]

Buster Cannon, when at rank 5 because of a White Spirit, does not gain any additional defense removal. Following the scaling of 10%,30%,60%,100%, rank 5 of the skill should remove 150% of the target's defense. This sounds absolutely ridiculous to report at a glance, but it does impact how bosses should be effected by the skill. Someone investing into the spirit should realistically be seeing 75% defense reduction versus boss creatures, as well as removing any lingering defense on players with buffs/passives that apply after the debuff by placing them into the negatives.

(Negative defense is treated as 0, if memory serves.)