Qik
First Post
I can't imagine it's an extra action to draw the bomb as well. If it were, the description would point out that the stuff to be infused would have to be in hand.
I like the archetype, and I don't see anything too unbalancing with allowing stacking with Alchemical Weapon. It's a neat trick which requires some feat expenditures, but it's not nearly as broken as some of the other archetypes out there. Even if it were borderline, I'd allow it simply for the coolness factor.
I agree, both about the infusion's required actions and about the coolness factor of potentially stacking Alchemical Weapon and other abilities/items/etc. It's very "alchemist."