A strong .09 like a Medallion or TD would probably work well too, and built really light a typical .10 might do the job. Not sure about the .10's though, I've never really ran any. I don't recall the Challenger .15 wing area off hand, I'll have to check and *update here. I do know the airfoil is a fair amount thicker on the Challenger.
*the Challenger .15 wing is 320 square inches.