I like strong mints over menthol. I've heard of koolada but never got around to trying it. I'm curious what it would be like mixed with Extreme Ice. hehe
Koolada would likely work well with it if you like the strong mints. I've mixed juice with peppermint, spearmint, wintergreen, plain menthol, with a bit of koolada, and it's a nice feel on the exhale. I also like just a small addition of menthol to my mints, not enough to really taste. It give it a coolness on the inhale, like the koolada does on the exhale.
I'll mix up my different mint flavors as single flavors, then combine different blends in my tanks. It makes it easier to find what works for me, without mixing big batches and having them fail.