Personally, I'd forget about competing and focus on the fun. If you want to be competitive, play them at their own game. You can't beat a Corvette with a Corvair. You can't beat a hi-cap Open gun with an Open Revo. As cool as it would be to do, it just aint gonna happen that often. A blind hog can find an acorn once in a while, so you never know, but for the most part....
I haven't fired the first round from an auto in competition this season. I've shot my 625 in Revo, my 627 in Prod. and L-10, and my 637 for grins and giggles (we do a BUG division in local ICORE, and it's my dailey carry gun. so the more practice the better). I'll be shooting my 627 in Open starting this month as I've recently added a CMore STS for ICORE Open, but I have no illusions of being competitive against hi-cap auto Open shooters.
As far as the fun part of it, aside from being good practice, I found it very satisfying when last months results came in and I was second of 10 in Prod. and fifth of 14 in L-10 with my 627! And nothing says you can't add an Open revo division at a local level. We do a BUG division at local USPSA. There's no classification for it, but who cares? It's good fun and good practice. Concentrate on that and it's much more satisfying.