In an new arsenal, I would have the maxxed-out as the heavy oil ball with an overall strong reaction. The Nexxus f(P+R) would be a good heavier oil ball like the maxxed-out, but it would have a stronger backend reaction. And, the same with the Nexus f(P+F) being a good overall strong ball with a slightly less downlane reaction than the Nexxus. The next ball out of the bag might be a Nexxxus f(P+S) which can still handle medium to heavier oil conditions but give you a stronger backend reaction than the Nexxus f(P+R). Then the nex ball should be a versa-max which reads the lane the best when it starts to get drier, and it has a smooth arcing motion. The versa-max is a great compliment to the maxxed-out. And the Nexxxus is a good compliment to the Nexxus because both clear the heads and have the strong late movement downlane. I wouldn't rule out a slingshot at the bottom of the arsenal when the lanes get fried and the versa-max is too much. So In summary:
Maxxed-out, Nexus f(P+F), Nexxus f(P+R)
Nexxxus f(P+S), Nexxus f(P+R),
Versa-max
Slingshot