RE:Striper Fly Lines
Are you sure about the Airflo? It may depend on which one you're using. I bought a clear intermediate 7000ts last winter and it worked great. Coils perfectly in the stripping basket or even looped on the hand. It's designed for cold weather but even in August it worked great.
You can't get too technical with this stuff or it'll drive you crazy. You might try a Teeny line, it sounds like the only one you haven't tried yet.