Though my suggestion might seem silly still hear me out:
I’m thinking that human shield and revive are two op skills that should have limited use.
We all know how tanky lee and Michonne is behind Carl, especially michonne with abs df, imagine 6* yellow human shield, about 1500base df, and 1800 base hp with abs df weapon and behind Carl.
Active skill human shield: Just like every active skill it will only be available when it finishes cool down and say it should be something like “human shield for 2 turns”. It’s going to be tanky but that way you atleast have a chance to do attacks when the human shield is down ( bare in mind it can still be countered by stun/taunt/confuse/focus etc)
Revive wasn’t really a pain when their was only 5s, but having 6s with revive now taking in to consideration how hard it is to take out one is going to be a pain.
Active skill revive : Make it something like “ revive 2 teammates with x amount hp”(with a varying amount of hp). Making revive an active skill limits its use but atleast you wouldn’t have to worry about being impaired (rush disabled)
Let me know your thoughts about it or something that I missed.