I was just going through the Rules Supplement and noticed this:
Actions
Under normal circumstances, the action marker can be used to either (a) stay still (not take a move action) and
then perform a full action or a quick action, or (b) move up to one zone and then perform a quick action. As
your quick action, you can choose to move again a second zone. You may not use the action marker to perform
two quick actions.
We were under the impression as long as you didn't move, that you could cast two quick action spells on your turn (not including your Quick Cast Marker), are we doing it wrong?
So it looks like the only reason you would ever prepare two quick cast spells is if you are planning on using your Quick Cast Marker for one of them?