um, there's already sniper and bruiser. Knockback 6 is just absurd, i don't know if you've ever experimented with it. Sniper gets many arrows and a knockback 2 bow, and bruiser gets a knockback 3 stone sword.
As for ressurector, it's getting a debuff, in our beta versions we've already reduced its speed and damage. It's critically overpowered compared to nearby kits, and it is almost undefeatable when newplayers are up against them.