That's what I was thinking, but only 1 infusion active at a time feels too limiting. The Artificer's known infusion to infused item progression goes 4/2, 6/3, 8/4, 10/5, 12/6. I think this guy could go 3/2, 5/3, 7/4, 9/5 and then end there. It would give you a little bit of flexibility early on...