There's a small world of Brunswick balls that CAN fit between the Raging and the Frenzy, as you've seen from the suggestions so far. I'd even add the Blazing Inferno, although there's a possibility that may be too close to your Frenzy.
If I were you, I'd check out as many of the good reviews here and at other places on the suggested balls: Bruiser, Inferno, Time Zone, and take a closer look at your oil pattern AND which of these ball others in your leagues (or tourneys) are using and which of these bowlers is close to your revs and speed.
It may be that a pearl (Inferno or Blazing Inferno) is more suitable or it may be that a solid (Bruiser or Time Zone) is more suitable.
Your "fast" speed & "lots of axis rotation" suggest Inferno (very low RG ball) or solid (Bruiser).
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