barrier can also be used in response to incoming damage too, while with heal you need to be hit first in order to recover.
so you could, for example, barrier when fizz catches you with his fish for full usage of the shield but if you heal you have to be knocked up, slowed and potentially get hit by grievous wounds before you can heal.
so you could, for example, barrier when fizz catches you with his fish for full usage of the shield but if you heal you have to be knocked up, slowed and potentially get hit by grievous wounds before you can heal.