As a tank, Morris is not going to be hanging back, out of range of his targets. Therefore, he will almost always be AA-ing someone during a fight, building stacks of Concussive Shells. At 1.2 attacks per second, there is a cooldown of ~0.83 seconds between AAs and you can get someone to their 5th stack in ~3.33 seconds of auto-attacking (if you start counting from the first hit).
I think that 25% is a nice baseline effect for his 5-stack figure, but I think that this is too quickly...
Posted: Apr 12, 2017