Big slapping 1,148 health so you are a bit more tanky, with extra power strength for an even stronger peacemaker. This is all at the cost of duration.

No, the duration isn't long, and thus you will need to recast your buffs often. When you really need to prepare for a damage dump, cast roar and shooting gallery, then use peacemaker and you will obliterate. A level 100 Ambulas for example, will kneel before you in a second.

The damage buffs:
Roar - 73.7% increase ( 39.45s )
Shooting Gallery - 62.25% increase (~33s)
Ability Strength - 373.5% damage bonus on base damage of peacemakers. 373.5% damage buff upon draw. x12.705 multiplier when you are at the smallest ring.

This all adds up to a very very strong peacemaker that will kill faster than any other [Mesa] build besides one that's running [Blind Rage].