I run 50:1 Interceptor, mostly because I can get it at my local CarQuest. You must be running HP Injector then (not sure what else is left for 2stroke oil)? That's fine at 50:1 as well. By quality, I mean higher end stuff like Amsoil, Klotz, Maxima, etc. If you were going to run Pennzoil or Quicksilver synthetics, maybe increase the oil to 40:1 or 45:1, petroleum oils, at least 40:1, maybe even into the 30s.
Really, it depends on your tuning and mods. For what you run, my opinion is 50:1 is good. If you have it tuned to the gnat's a$$ (or are unsure of your tuning), might want to run a bit more oil for safety. Tons of people run 40:1, if it makes you feel better, run it. It really won't hurt anything.