Good luck man! I'm betting this does the trick, and with the high compression your running, getting too lean like that could sure be the cause of all your frustrations.
I'd still get the head checked out. I think when I get my factory head milled, I'm gonna get the squish band as wide as I can. I really want it like 10-12mm wide and then the combustion chamber deeper, to get the cc I want, but I havent worked the math out yet and I don't really know if that's possible with the factory head, but I hope so. I'll be keeping an eye on your build and how this pans out.
With that head, you have options. You just gotta have your numbers spot on. If it's gotta be milled, you gotta know how much. You can order a custom dome to your specs.