My opinion: There is a chat in the game, use it.

You do the same on 3mobs and the healer, too. Tell them for example that you will Flash -> Overpower and then they can sleep the mob that is marked that way.
The Healer might not even know your skills, so you might need to show him one time.

It's not about adapting in that case, you are a team and not a burden to each other.