I would add something about elixir (tank and melee):
- when someone asks for everybody to "pot" (or "pot up"), it means that you may need to use a tank pot (the blue one) and in some cases (when the boss is really hard or when the party is not strong enough) you can add the melee pot (red one). When everybody pots, don't be cheap, pot yourself. Otherwise, you may die very fast and be useless to the others. And they won't tell you nice things and invite you to remake the game.