It’s pretty powerful. I usually do a drop per 15ml. but I think it might be a bit too much for this mix, so I would recommend starting with just a drop for every 30ml.
At 1/10 ratio it has an intense cooling effect.
Better to start low and go up, than starting high and ruining a mix.
Koolada really doesn’t need a lot of steep time, so you could add it to a completed mix after steeping. If you find the sweet spot you’re after, just let it sit for 8 hours and it’ll be at its maximum flavor (it’s a little more intense when added and vaped, than it will be after an 8 hour rest.)