Who wins??

Trollspellsmith VS DBSK VS Chunin in terms of farming

In soloing Alpha Omega or Necromancer or Trollspellsmith

And what can I use Alpha Omega for???

I use chunin for farming because i kill faster and more at the same time
and for soloing i use necromancer because it can heal and you will never lose mana

Um.. What is Alpha Omega good at??

AO is good at group heals and fast killing for non-boss mobs from my experience.