Yeah. even though I haven't played since the beta, I think I quickly learned that lesson when I got back in to the game. Back in the beta, everybody was rushing to do everything as quickly as they could...same with early access, and I was the same, but now I see how much teamwork is needed later on. Without synergy between the healer and the tank, something is bound to go wrong. In my opinion, their relationship is always the foundation a team is built on...or at least, a light party. I haven't done any 8-mans yet, so I can't speak for that grouping.