My Monk does 71k against Ancient Mummies, using the mace Grand Cross ;3
Well, that doesn't answer my question of why turn undead could be that powerful.
oops D:
Sorry ;o;
But, yeah, here's the skill description
for chance of cast
[(20*skillLVL) + Luk + Int + BaseLV + (1 - Target HP/TargetMaxHP*200]/1000%
With a max of 70% chance to do holy damage equal to the current HP on an undead monster
if failed, the monster will take holy damage equal to [baseLV+ INT + 10*SkillLV]