We should form a wall the best we can but while still staying outside the movement range of the enemy, as we should be getting the first attack. The closes the enemy can get to us is N3 so we should stay one square away from it.
Also by predicting the the best I can, our major battle will most likely be fought just south of the bridge, barring no reinforcement from the enemy. If there is reinforcement, most likely entrance will be NE or SE or the castle itself. NE and the castle is the best scenario as we can just keep going forward while SE is good scenario but will need to divert units to the rear. The worst scenario would be two reinforcements coming with one of them being from SE.
As for the specific of the first move, I say Tenshi should move to L3 and we start the wall there to diagonally SW with the slower non-range units on the front so we can all attack the enemy next turn.
Why am I not saying anything more specific? Well, then we all wouldn't be playing this if only a few just told everyone what to do. This is what I found somewhat troubling when thinking about it, certain few people (including me) were telling what the others to do specifically and that's just not RPing if the others don't think for themselves. I think we should also try to include some IC conversation in this too.