A perfect Storm arsenal in my mind would be; Sync, Nano Pearl, IQ Tour Pearl, Crossroads, and Breeze. No need for Frantic. Weaker core version of Crossroads and because of that it isn't as versatile.

You would have the entire spectrum of conditions covered with that 5 ball arsenal.

I respectfully disagree with completebowler. I think the Frantic is one of the most versatile balls on the market right now. Mine is actually stronger than my Crossroad. Personally, I think you can cover just about everything other than the absolute extremes with just the DP Taboo and the Frantic. You may be able to get a little more separation by going DP Taboo, IQ Tour (Solid), Crossroad. The IQ Tour Pearl is a good ball as well, but that one can be very condition-specific unless you change the surface. If you're intent on adding an IQ Tour Pearl, I would put a Frantic above it. The Frantic is earlier and can handle more oil than the IQ Tour Pearl (at box finish).

I have to agree with Gene and also respectfully disagree with completebowler about the Frantic.  That ball has been surprisingly versatile for me and I have been able to use it on pretty much everything medium-light all the way to some medium-heavy patterns.  Definitely a great ball with great carry.

Now for a good Storm arsenal, I also want to say that their sister brand Roto Grip allows you to mix/match to get virtually anything you want.  Here is how I would go based on what you mention:

Heavy: Storm Sync
Med-Heavy: RG Disturbed (solid), RG Berserk (hybrid), iQ Tour (solid) or Marvel Pearl (pearl)
Medium: Storm Hy-Road (hybrid)
Medium-Light: Storm Frantic (hybrid), Storm Tropical Heat (pearl or solid), RG Wrecker (hybrid), RG Shatter (pearl)
Light: RG Scream (pearl), RG Shout (solid), Storm Tropical Breeze (pearl or hybrid)