So as im playing beta,ive created what i wouldn't usually play which was a mage .

Surprisingly im really enjoying him now,plus I got this Ultimate skill,with which I can use once in a while(long cd ofc) to pawn lots of mobs,even the most difficult ones(mini-bosses etc) fall to it.

Was wandering for my real game if fighters have such skills,which help them solo the most difficult mobs?

Eh, there are no cooldowns, unless you mean that it takes a while to refill your ultimate after using i.

As there is no fighter class, I'm wondering what you mean. All 4 classes have ultimates, the guild skill lines have ulimates, the armor skill lines have ultimates.

The other classes can solo fine