The knockback is good as it lets you isolate one person. What Mnk really needs is to trim down its 7 hit coombo or have the other ws do things. Currently they're there solely to increase the combo length which is a bad design. Further as their role as a rushdown high aggression dps they need more ways to not be able to be stopped. I'd recommend giving them Mantra, and aoe purify/immunity. Also their LB should do more damage. 32k at max buff against a single target is pretty pathetic compared to other jobs.