Did you ever noticed the AI to destroy a Wall?

[Keneth]

That's true, a spell could come more in handy than a rage ability at times but making for instance a phantom and placing it within reach will more often than not soak a lot more than just one hit of damage, even more so if you make some thorns which cost no mana and are usually a high priority for enemy attacks. But I guess that's just from a warrior's perspective, I rely quite heavily on rage abilities and less on spells which are few and weak.