Yea when i feel like using my KFF mek and SAG mek, i usually just go all the way and make a make army. 6 killa kanz, 2 deaf dreadz, 10 gitz, lots of lootas, and shoota boyz.
It actually works better than you would think, if i run it, there are usually 3 trukks, 6 kanz, and 2 deff dreadz to shoot at. Target overload for certian armies. Of coarse against tau this list doesn't even make it out of the deployment zone, DAMN YOU rail cannons.