Without knowing your stats or knowing the layout of the balls it will be difficult to say where you are overlapping and where you have gaps.

That might be why you didn't get a response last time.
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Speed Kills
When in doubt, move out

Layouts are all different but I'm a high speed lot of rev player. Its pretty much lately play straight up or crank and swing the hell out of it. Last time I asked only got 1 response and don't agree with keep 2 and throw rest out

Well, if you're bowling on a THS pattern you should be good with about 3 balls depending on if you're bowling on a fresh shot or a second shift league that the pattern is already broken down as well as wood versus synthetic. Depending on how you have them drilled, I would go with what JohnP mentioned that about 3 balls would work (4 if you use plastic as a spare).

Now if you're more into doing tournaments then you're going to have consider not just the layout of your balls but the coverstock and how you want to prep them. Go with the ones that gives you the best reaction and carry that you feel most comfortable using. My problem the last 2 years was that I had too many balls that got me confused to what to use on which pattern and that did more harm than good. I didn't take the time to look in-depth with the ones that I did the best with and asked myself why.

But from what I see, you have a well rounded arsenal so now it's just a matter on taking the pros and cons of each ball and see which is more beneficial.