[ano]

I just didn't get it...
I had a huge army storming the castle defended by many mages and some troops and an A3 Rakhsharaja with 3 gems scripted to cast Mass Flight (spell requires A4 and 2 gems). It should have been an easy victory.
But he due to some reason decided to cast Arrow Fend and Storm Warriors and obviously things went in quite another way with much more losses.

Can anyone explain this? Maybe there're some bugs with this spell?