Even if you play on planet bowling ball, you can brack any unit into a corner if they try to avoid you, or you can bait them into getting close. Knight players want to get Stompy, but a large group of low point mooks is not their prime choice. Pin them, move in your anchor unit(s), then ignore them while you defeat the rest of their army. Hidden power fists/hammers/Melta bombs/haywire will take care of them. Space out your dudes, even when you pile in, to defeat blasts. Or avoid CC and bracket them, pump them full of S8+ AP1-2 (into more than one flank if a SH), and watch them pop. Or focus them with your Flyers. Pull on your big boy pants and man up.
SJ