Sorry for my slow replies! Busy work week. Thanks for waiting for me.
What about the two other doors? We should at least read the description in the stonework above the doors before entering. One could read "room full of henchmen".
After that, I guess we're entering Wizardland. It's a double door, so we could keep one closed to step behind as cover. We know nothing about the next room, so I could open the door and let Heinrich scout a few steps with his Urban/Rural sneak skills. There may be cover or an advantageous position to be fighting from.
If we open the door and there is no cover, just a big room with some wizards hanging out, we have Heinrich send some arrows at them, and move in. Admund and Klaus can take the front of the group, Max, Ulrun, and Heinrich in the rear. When we have an idea of what we're fighting, we can go from there.