How about another feat for spell casters who use guns
One with the Gun
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You and your gun are one when it comes to your spells. Prerequisite: Proficiency with a firearm, ability to cast spells, ability to cast spells through the firearm Benefit: Add the enhancement bonus of your firearm to the DC of your spells. |
Thoughts?
Throat Punch Games 
Mages with guns? How am I not signed up for that -right f’n now-?
Check ultimate Combat, its awesome!
Done. Like the idea of a gnome gunslinger/mage. Oh, the wall of lead possibilities.