So many variables regarding paint/reduction/air, that rarely will two people have it exactly the same, even weather plays a part. Add to that the size and coverage you want to paint, the level of detail, and opacity or transparency you want in your paint, the brush, nozzle size, etc etc.... and it becomes a very individual thing.
I also love Wicked, never met a surface it didn't like. But the heavy pigment that makes it so versatile, and makes colour pop, means it needs lots of reduction.
Totally agree with Cheryl, reduce, then reduce some more, and yes, the high performance reducer (W500/4012) is a must. Experiment and find what works for you, but you want at least 3:1 as a starting point to work from, if not more.