it depends... sometimes it goes without problem, but other times you just run into annoying people... like yesterday, EC weekly, we make our way to the tanks. Everyone ready, go... I dance around the tank, healing the people, and already see our tank does not know the DD mechanic. Ok, we survive that, then he runs with us under the shield. Wipe. Ok, next try, I explain every phase and what/where to do. Shield phase, the guy stays on the tank, we wipe. I ask to switch tanks, since the other is easier to manage. The other tank doesn't have a clue how to tank the other tank. I was facepalming hard
But none of them would come out before the fight saying don't know what to do.