ToME: the Tales of Maj'Eyal

With level 5 obliterating smash should reduce armor, but you need a level larger than 5:

if self:getTalentLevel(t) > 5 then
target:setEffect(target.EFF_SUNDER_ARMOUR, 5, {apply_power=self:combatPhysicalpower(),src=self, power= t.getSunder(self, t)})
end

Irrelevant for Doombringers, but for a Wanderer with an talent efficiency with 1.0 this bonus is unobtainable without spending a category point.