I've found that I can pretty much handle all of the patterns (unless really flooded or a bone dry) with a 3 ball arsenal..

 

Rattler (long and medium pattens)

Damage (medium and short)

Mojave (short patterns)

 

I have just about everything in the way of equipment, but these three have turned out to be the best for me..

 

What's been working for you??

Even though I dabbled with a lot of other things, after several years of the PBA leagues and a summer of the (tougher) Team USA Experience conditions, I pretty much used a Black Widow Bite for the long and heavy stuff and a Wicked Siege for everything else.  I don't know if it's the newer covers matching up better or just how these two balls read these patterns, but I used them almost exclusively.