Responses
The first one works but I think the village is too small to successfully do the rest. There would still be a lot of casualties. And considering they didn’t have a wall in the first place they would never be ready for a proper siege.
He just magicked up a wall without telling anyone. So I am imagining a senerio where he trusted his loved ones enough to say, hey I can create a big ass wall to protect the village just in case we get attacked by monsters. One where months maybe even years ago he shared his worries with his friends and family.
Just a thought or two.
1. Get a ladder don't break the wall.
2. Get any archers or mages with projectile magic to perch on top of the wall and fire.
3. As for everyone else, sling shots, molotovs, anything heavy, hot oil/water. bombs made out of flour.
Basically with the wall they can treat it like a normal siege. But the hero has a complex so...he wouldn't think of working together.