The way I see it, this would be very finicky, as well as somewhat counter intuitive. Do you have any idea how this would be coded? Or some math behind it? Is this a function of shots hit over the time it takes to hit? It also seems VERY abusable. Once he procs, vaga hides until such time that he can proc again. Or if you don't hit in X-1 time, you know your next hit WILL hit, so you change your target.

Can you clear up any of these concerns?