Problem With so many Runearms in the game it’s a total waste that only one class can use them. Sure you can multi-class by splashing 2 levels of Artificer but this makes taking a capstone impossible. Then consider that multi-classing is further compounded with how the Runearms “shot” is based on the Artificers level and NOT the players level. In short, its not a good trade off no matter how it’s spun.
Suggestion How about opening up Runearm use as a arcane spellcaster feat, with a UMD requirement that scales based on the level of the Runearm equipped?
UMD Check: 20 + Runearm level, and what-ever extra requirements that are specific to the Runearm. (Such as alignment) This would firmly place Runearm use above 3rd or 4th level for anyone but an Artificer (@ lvl 2).
Thank you for your time and consideration.
-Smoke