I think we got our rider. Just uh... get rid of the big Skull belt buckle.

Also, gotta' agree on your thoughts about Cy-kill having something more than brute strength to offer the Renegades. As a former Guardian, he could have offered transforming technology to the Renegades. In the cartoon, only the Guardians could transform while the civillian population was strictly non-transforming. They make a big deal about it in one of the episodes, how it's like this big badge of honor to be given the ability to transform. Like - "You're a Guardian now!" I think the origin episode for Cy-kill showed Renegades being able to transform prior to Cy-kill taking them over as leader, but we're doing this our way, right? Hehe.
*EDIT*
I was just watching Cy-kill's origin ep and the Renegades did have the ability to transform prior to Cykey taking over. But whatever.
Still, he's got to have something else worthwhile to stay their leader. Knowing the Renegades, they'd kill him once they'd gotten the transformation technology. I like to think that he brought a sense of organization and military discipline to their ranks that was lacking before. Cy-kill should be the one that transformed the Renegades from a disorganized pack of extremists into a professional army in their own right.
*EDIT*
Ooh! Ooh! Also in the origin ep, Scooter said that before Cy-kill took over, the Renegades were scattered across the galaxy! Nice. So maybe there's something to that.
His knowledge of Guardian methods and individuals would also be of great use. It would be much harder for the Guardians to infiltrate Renegade camps. In my own little version, I like to think the Renegades were suffering several losses due to Guardians that had been reporting all their battle plans beforehand. That fridge over there? That was a Guardian the whole time! Upon arriving in Renegade camp for the first time, maybe Cy-kill recognizes a piece of hardware or a vehicle as a Guardian in disguise and blasts them on the spot. Yeah, yeah!
... In addition to the cleverness, dirty fighting, and sicking Zod on his enemies.
http://www.youtube.com/watch?v=4dMS0m6crM8