[Endoperez]

It's not all about the spell. Most Fire 2-3 mages have precision 10 or worse. Compared to Thunderstrike, which requires Air 3 (+3 precision) and has +2 precision, it will of course miss a lot.

It sounds like Conceptual Balance at least could make it a bit more precise, but when I tried EA Ermor Augur Elders (the only F2 mages with high innate precision I could think of), they had little trouble hitting the enemy forces, and the first star of experience increased their precision a lot. You're right about Abysian mages having trouble hitting with it, although I only tried it in few battles.