I would say your general best bet will be Saber. It provides the most protection and seems well suited to the "rough" tolerances mixed at the 30:1 to 50:1 range. It's an oil designed to run at up to 100:1 for precision engines, but these are not precision engines.
I know your quandry, because all three work pretty well. I'm running Dominator now. I have plenty of customers running Interceptor. All with great success!