There's no way I'll ever vote Republican again no matter what (even if it means Hillary gets elected. I'm no longer under the delusion that I'd be better off with a nominal Republican than with Hillary).
Uh, if you're not happy with RINO Republicans, then oppose them in the primary and vote for more conservatives ones. Why would you penalize truly conservative Republican voices in Congress by never voting for any other Republican?
Because they're not real Republican conservatives to start with.