With agility, Alt is an overpowered unit, and he will always be chosen, at least for breaking through defenses. Moreover, the accompanying unit will no longer play a significant role. For example, you can look at the Dancers of the Wind: no one ever takes the Death unit, even though it has AoE.
That would be great.
By the way, it's good that you reminded me: there, apparently, an increase to 100% parry will not be enough; it will also be necessary to increase the damage to the level of Alt (4-6 instead of 3-5).