What's the point of Acid spells?

[IanTheWizard]

Compared with Fire and Lightning spells, Acid spells don't seem to be better, overall.

Take Acid Blast for example, its Effect is just a bit better than Lightning by 1. But it requires a lot more Stamina and noticeably higher Complexity, and its Range is only 5m.

I think using Fire and Lightning spells is enough. Am I missing something?