Auto-translated
In short, here's what I suggest (though I might be off, as I was already sleepy and wrote this at night):
Warrior - top cell in front of the door. If the initiative (or control) works out, he should be able to reach the mage or archer from that position and paralyze them. Possibly even kill them.
Aloris - bottom cell in front of the door. He'll be the meat shield, because that's what he's for. He probably doesn't have stats good enough that, even at 33% of their value, he'd be a worthwhile combat unit.
Zaorish - above the Warrior. Similar to the Warrior, he should have a chance to paralyze one of the archers/mages. However, he has relatively low initiative, which somewhat reduces the value of this possibility.
Christian - below Aloris. He'll hack away at the melee units that approach. He might tank a bit, but it's unlikely to be necessary.
Ikhtir - above Zaorish. He'll take Zaorish's place and help against the warriors, if at least one of them reaches and occupies the correct cell.
Archer, Le'Rau, and Earron - I assume they should be placed as far back as possible, against the church wall. I'm not sure if they can be positioned so that they can deal damage without being within range of the enemy mages and archers. Their speed is a bit low. Also, a skill is needed to attack and move in one turn. Perhaps the healer could be placed closer to the warriors. But I think freezing with combat magic will be more useful to you than healing. Besides, he has good initiative and might be able to deal damage/freeze one of the mages before they can do anything.
Earron - you could take a risk and place him behind Aloris. This way, he can reach any enemy. Given his initiative, it might be possible to kill the second mage. If it fails, he should have a good chance of dodging enemy arrows and combat magic. But if the enemies have something like paralysis, control, or a cloud, he might have a hard time.
Benjiro - I would place him to the right of Ikhtir. This way, he can move three cells down and try to control one of the warriors. If Benjiro succeeds and the warriors' initiative is higher than the mages' initiative, then you can confidently go on the offensive. It's unlikely that even one enemy caster will survive until their turn. And it's not even certain that the archers will survive until their turn either.