I think the main issue here isn't about the 100% boss damage. Sedy could you please revert advanced ice fusion to what is was before (grants advanced ice property but no 100% damage to boss, if the override was because of the damage on bosses)
Because whenever we activate advanced ice property now, we cannot use our ice skills that requires ice infusion as the advanced ice has overrided and removed the ice property. Please do look into this.
Thanks, Natsuki