KMST 1.2.460 - Xenon

Orange Mushroom has the details on Xenon's skills up.

So the way the Stance, Resist, and Avoid works is that there are five different passives, and they give you 10% of them for each of the stats above a certain amount, having all three stats above the amount gives 10% damage, and the description outright mentions AP instead of just having the stats.

So it looks like all three stats is the way to go. 260 in each stat for 50% Stance, 50% Resist, 50% Avoid, and 50% damage is too good to pass up.

Not like it really matters though. Their skills passively give them like +100 all stats. It's fricken ridiculous.