I've been struggling to figure out the right play style for Ten Numb, and I think I finally hit it last night. Yavaris with Fighter Coordination and Flight Commander, Toryn Farr on an accompanying ship.
My CC fleet was attacking the Imperial base on Corellia last night so I had first player against two ISDs and 9 Imperial squadrons - Jendon, Zertik, Vader, IG88, Mauler, Jumpmaster, 2x Advanced, and Soontir. My opponent had bested me on a previous showdown, but I learned my lesson on how to play Ten Numb effectively. I kept my squadrons tight until he moved his squadron ball in close. Yavaris FCT'd Ten Numb into position and got crits on both shots. Mauler was only unscathed because he had held him back. When Yavaris finished activating first on the next turn, Vader, Soontir, and both Advanced were all dead. IG88 was on 2 life with no Scatter token, Mauler was down to 1 as well from Ten Numb's ability.