Well Pugilist was designed to be a dd/tank class and lancer is designed to be a dd/support class so it isnt any surprise that pugilist is better at soloing. Especially on Skeletons which are weak to blunt damage.
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Take a LNC against a mob weak v. Piercing Damage and see how it stacks up against PGL. You'll find that LNC will own compared to PGL in that case. It's all about the type of mobs. Familiar with a Bones Party in 11? Didn't see many Dragoons in one.