i average 14.5-16.0 MPH, and am a lefty with average RPM. i generally play wherever i can get the best entry angle. however, i can comfortably change speed and release: i have become adept at increasing/decreasing the ball speed, i can add tremendous amounts of sideroll or direct forward roll without any loss in consistency. it has taken awhile but i have become MUCH more consistent.
i use alot of leverage drills, i don't have much particle (i also prefer pearls over solids), and go over the arrows from 10 to 18 board. the breakpoint will depend on angle: i will make it work.
preferred balls: Lane #1 hybrid dirty bomb, ultimate inferno, brunswick power groove, Lane # Golden Nugget (light load particle)
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Brunswick and Lane #1... there is no other.