That strategy can work against Inoue but the amount of stamina should be doubled or tripled because after all, Naoya Inoue is on a different level and the most dangerous boxer currently at 117.
I certainly agree with that, we saw in their first fight that Inoue has received lots of big shots but Inoue is still standing. In fact, Inoue's eye socket was damaged and yet he continue to fight using the speed as his advantage. In comparison to the stamina, Inoue has the edge because he is the younger fighter and both of them are hard working fighters.
Honestly, it's hard to tell if Donaire will win, but who knows.