Windmill triggering Mineral Hail

So..seeing this and I will clear it up, Windmill spamming, if doing "Non-Stop" will prevent him from using Mineral Hail, no matter what in any difficulty.

EDIT: I forgot to mention, he can use Mineral Hail after Windmill used, and no it will not cause him to use it right away, it depends on AI and HP he is currently in. I had him use hail after his successful/canceled skill.

Few days ago in my Hard Runs: Windmill was successfully executed (A member did it) --> Girgashiy's AI reset --> Girgashiy uses Soul Absorption (His HP was currently at 22% that time) --> Girgashiy's Soul Absorption canceled or finished (We canceled it) --> Girgashiy uses Mineral Hail (Girgashiy has not used Mineral Hail until now after canceled Soul Absorption).

So what happened? Because the Windmill is not used again after Soul Absorption was cancelled, therefore AI was not reset and due to that, Girgashiy immediately used Mineral Hall after that. So, to prevent it, windmill spam was necessary to keep resetting his AI so he can't use Mineral Hail (It varies after number of successful/canceled skill he used, it can happen after single or few skill used).

As a bonus, I will tell you, when Windmill was used, Girgashiy doesn't attack or use any skills for at least 1.0-1.2 seconds (At least half of Windmill's spinning animation).