So I am looking to add in one or two more pieces beforewe start some of our local tournaments.  Here is what I have so far. 

Mastermind Genius (medium to heavy)
Melee (medium/benchmark)
Ringer platinum (lighter)
Strike King (Sahara desert)

I don't need a heavy oil ball yet because we don't every get that much oil here ill tackle that when I have to.  I think I should be fine with what I have but I was wondering if having the Grease monkey would double already what I have or if that would supplement between the melee and the ringer.  I hear a lot of good things about Radical balls so I wanted to add one in from there.  I was looking at the Grease monkey for when I want a different look then the melee and Yeti untamed or Reax 2 pearl when I want something a little weaker then the mastermind genius but stronger then the melee.  Just wanted to see what people though of those.  Didn't know if I should post in the radical forum or here. Thanks!

ps of maybe some dv8 options would be better?  Like the dude/diva? 

I agree with Adam that you should have a solid cover that you can put some surface on it, like the blue ringer. The Diva would be a good choice because it has a stronger midlane roll and you can adjust the surface as needed. Even with a stronger drilling, the Dude would have a similar reaction to the Melee. In the Radical Line, I would think that the Grease Monkey would be similar to your Mastermind Genius. I would think that a Yeti Untamed would work above the Melee and below the Mastermind Genius plus give you a solid cover.

I agree with Adam that you should have a solid cover that you can put some surface on it, like the blue ringer. The Diva would be a good choice because it has a stronger midlane roll and you can adjust the surface as needed. Even with a stronger drilling, the Dude would have a similar reaction to the Melee. In the Radical Line, I would think that the Grease Monkey would be similar to your Mastermind Genius. I would think that a Yeti Untamed would work above the Melee and below the Mastermind Genius plus give you a solid cover.

I will take your advice!  I like the yeti untamed and may be going that way.  Thank you very much!