So, I recently played a game against Khador, and on feat turn with pSkarre with dark guidance up, Slaughterborn walked through two doom reavers, four widow makers and then slapped a destroyer in the face for a nice 10 damage(as nothing else was in range for the last killing spree hit). Bottom line, MAT8 on three dice is hitting every. Freaking. Thing in the game, and killing every single wound infantry. I can't think of a better caster to take him with, for that level of performance.