I think that Spinstroke should get a larger damage bonus when attacking the enemy not engaged with the Gladiator. The reason being is that a Gladiator that is not getting enmity does not get to take advantage of their higher HP, defense, and shield. So a Spinstroke dealing more damage could serve as a way for Gladiators to do extra damage and get some of that enmity back.

And maybe have Cover be able to function as long as we're in proximity of the ally. Enemies love to dance around these days and it can be quite difficult to tell if Cover is functioning when you're standing on top of your ally and enemy at the same time.