Expanding from spite's post about "Things the AI still doesn't recongnise", I thought I would branch off in the spell area in which the AI never casts.
Although I love this spell to this date I have never seen the AI uses this at all
In addition to the Wall I have seen the AI cast this as well.
Now the AI does cast this but always behind them or away from the enemy and not at them.
So its odd that they cat them but not properly.