I have question regarding what is permeant bonus. Or rather are you overwriting the base behavior where bonus form items became permanent after 24 hours of wearing them.

Regardless I think I will try to make build based on Spell Cartridges and SoM. With classes quite likely gunslinger and sorcerer, replacing some stuff to get some SoM and Feats. This reminds me, are Legendary Talents from SoM aviable?