Okay, I'll keep this short. Firstly, I suck at maths. I would likely get this wrong if I did it myself.
Anyway, I just hit 814 SkSp with my MNK, which is an outrageous amount of SkSp and reduced my GCD to 2.32 raw, 2.21 at GL1, 2.09 at GL2 and 1.97 in GL3.
Now I'm curious as to how much SkSp it would take before tornado kick > snap (PB) > snap > snap mid rotation becomes a dps increase and not a loss.
Obviously we need to take into account not only the lost potency of the snap punches, but the increasing potency and decreasing GCD per hit. When does the 330 potency under GL3 become worth it? We can assume that instead of this we would have been doing snap > bootshine > true strike instead of the 3 snaps.