Dang, that's rough. If I was to re-do my one arcade experience though, I don't think I would do adsense at all. I would strictly do CPA offers on zip or mobile submits now that I know what I'm doing better in CPA-land.
Please let me know if you have any good ones. I'm also thinking of moving away from adsense on my arcades.
You should hit up StickyCarrots on what he can do for you with PeerFly as a first stop. I haven't done his network justice (yet), but monetizeit has some equivalent offers that would likely do well do.