Sounds great! I'll get the testers working with this right away.
The AI doesn't need to be 100% perfect, I think, especially given the limitations that you are working within, here. As long as it doesn't interfere with standard play and can handle some cheese, I would say it's a victory.
As a note: Furin experienced that, in the 3rd fight with shadow creatures near the Icara's hut, hiding inside the hut and closing the door with Ice Wall caused enemies to move objects around outside, rather than destroy the Ice Walls.