From my understanding of Ranged DPS and their abilities, it seems that Dark Elf Sorceress, Greenskin Squig Herder, Greenskin Shaman are more single target focused. Bright Wizard has a few major abilities requiring Ground Targetted AE - Same goes for the Zealot.

Unfortunately (as you can see), I only know about the Destruction side + Bright Wizard (as I had and am still considering Bright Wizard for boxing).