I mean, you know what would be even scarier? Mages that understand the principles of firearms and physics. 

Imagine mages using a long, thin tube with a closed end... and then igniting explosive magic off at the closed end to accelerate enchanted bits at supersonic speed towards their enemies. Or take the principles behind it to accelerate existing spells at the same speed.

Take owo's magic sniper and take it up a notch, and make the entire construct a magically created one...