That's what I use. Incredibly powerful character for the pts.
I just like the long range opportunities of the KFF warboss with a +1 to wound. Means wounding on 4s almost always and even 2s against tough stuff. I can 't grok the math with so many re-rolls and such, but it seems like that would be a credible threat against tough targets every turn. I could see adding a deffskullz detachment with this guy and a KFF big mek, 3 grot units, and some lootas. Then I'd do my usual Blood Axe force, but use da finkin kap to get Brutal But Kunnin on my warboss.