including dv8?
if you are including dv8 i would say neon misfit, DIVA(BY FAR), aura paranormal,and meanstreak brawler

if not dv8 sun misfit and marauder for pearl karma and ringer

4 Versa-max with different layouts and surfaces!

Assuming you're implying you don't want to go that route, my 4 balls of choice are:

Strictly Brunswick:
Strike King
Meanstreak
Meanstreak Brawler
Aura Paranormal

Brunswick and DV8:
Strike King
Maurader Mutiny
Meanstreak Brawler (or Diva)
Aura Paranormal

what about this..

sling Shot

c system 2.5

diva

maxxed out

Strike King - light

Ringer or Meanstreak - light to medium

Meanstreak Brawler or Mystic Aura - medium

Meanstreak Beatdown or Aura - medium to heavier

I find the Ringer to be much more ball than the Meanstreak.  I love them both, but the Ringer is the stronger of the two and has much more backend pop for me, even with similar drillings and surface. 

I'm also surprised to see the Mystic Aura as a step down from the OG Aura, but I only own the OG.  And that's a great ball!

I'd go:

Light: Strike King
Light to Medium: Ringer
Benchmark: Meanstreak Brawler or Marauder Mutiny
Heavy: Aura Paranormal

larry mc
You might consider these from Radical:
Torrid Affair - lighter oil
Reax Pearl - heavier oil