Aran - and at first I hated them with a passion.
They are still the all-time supreme mob class with low needs for funding.
With a large sum of quests for items/skills they are pretty cheap to maintain
They have a HP Drain and a pretty low cost on MP skills - making them cheap for training if thinks can't kill you quickly
But the biggest reason I love them is for the amount of mobs they can hit with their attacks
12~ mobs per attack and mobility to match and/or to exceed one with good jump timing makes them legendary
(I see what Nexon did there)
But they can be repetitive if you dislike pressing x
Either-or you could argue a high level magician is the same.