I would say with two "heavier" oil balls, to get some weaker-ish gear. I personally haven't thrown anything that's out there and weaker in the Storm/Roto-Grip line-ups. From what I've seen in pearl covers, both the Reign and Nomad Pearl are similar and are fantastic. For solids, the Furious looks good. The Nomad Solid I haven't seen much, but I would sand that ball down instead of it having a polished finished. Maybe to 2000 or something similar. The Reign of FIre is probably too much ball and may overlap with what you have.
If I had to choose one, I would suggest the Reign. If you get two, the Reign and Furious.
Good luck in your ball cohice!
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Proud Supporter of Rob Stone
Obviously, you aren't a golfer.
Some stayed in the foothills, some washed logs like teeth.