Aaron, Can you show a screengrab of the surface before the Ballnose cut?
Is it an.stl or such?
Just thinking a Profile On Line cut with a "project onto 3D toolpath" box checked may work after you've hogged out the profile curve of the tops of the "ridges".
To reduce air time maybe alternate Start Points in Node Edit for the first pair/Group/ and THEN linear array?
Apologize if I'm off base, but been up since 2 and my eyes may be playing tricks with your image.
scott
scott P.
2013 Desktop/spindle/VCP 11.5**
Maine