I'll chime in with the Defiant.  For my game (18-22mph, 420 revs), it easily works on longer patterns and those with heavy volume up front.  The thing I like is that it offers a predictable motion and takes surface changes well.  I've used 2000 grit when I need an earlier read on heavier conditions.  Normally I leave it at the box 4000 grit finish.  Either way, it's a great ball and it fits a lot of styles well.

on heavy oil your gonna want the ball to start reading the lane sooner so i would do a pin down to make it start sooner and have a nice controllable reaction.

on heavy oil your gonna want the ball to start reading the lane sooner so i would do a pin down to make it start sooner and have a nice controllable reaction.

+1.  My Defiant is drilled pin down to get an earlier read and be smoother overall downlane.   I actually replaced my VG Nano with the Defiant and like the Defiant more due to the predictability and how it provides more of a hard arc motion compared to being more angular.  I also like that it is a little more versatile than the Nano.

Several people in my league have one, including myself, a 2-hander who puts 500+ revs on it, and a stroker who is probably around 300 revs.  All 3 of us have had good results.