Ok Read this because MHarris can explain it all better then most of us.
Myself I dont believe in the blood type therory. I tend to think it matters more what your ethnic back ground is and age. Natural mones are made by your bodies hormones not your blood and your hormone levels change as you age. Just my opinion though.
You best bet is to keep upping your dose of a none product till you expereince a OD. Then you will know for sure how much none you can handle in a mix.