What's the point of Acid spells?

[IanTheWizard]

Always you can buy 2 spells, one to long distance, one to near.
Differences in acid spells stats and fire/electric are not big, but acid fog have radius, when wall of fire and barrier are thin and wide.
In cave is hard to kill mobs, then little difference in effects can be more important.[right][snapback]43954[/snapback][/right]

Thanks. I understand.