As I mentioned when I sent this to you earlier in the week, 7m Edge gets this ^^^^^ high

He's not flown C's yet (or at least not regularly,) so why change, especially for the high winds... As you know, a 'C' boost is a different technique. IMO, from what I hear, 7m Edge.
The 7m Edge will be plenty fast, lofty & will loop round fast enough to satisfy his cravings. Plus, he'll still need to be right on his game, to keep his landings safe.