TBH, I don't think Rampage will be able to keep up with the pace and that Rashad brings. Coupled with his speed, power, movement and solid chin, it could be a bad night for Rampage.
Like I stated earlier Rampage is extremely flat footed, robotic, never checks kicks, and is always looking to throw power shots. He's very predictable. If he can catch Rashad clean he can put him away but again the way Rashad moves and the volume of shots he can throw in comparison to Jackson will be the deciding factor. I also think Rashad is the better wrestler.