I'm trying to make a build for a mage that ONLY makes and uses magic items and doesn't otherwise use spells of any kind. What would be the best way of doing this in a Submerged level game? I'm thinking Focused Practitioner with Ritual(Crafting) -2 and Refinement -7 (Extra enchant slots).

Would that get you the most slots? Is there a better build out there? Also is it worth grabbing a focus item to help with crafting?