This is a construct tribal deck I think so
animation module doesn't fit since he wants to make the mimic a construct and not a servo. A good addintion on theme would undoubtely be the
scrap trawler which pseudo combos off more with
pia's revolution as well,
Pia nalaar herself would be great too, make a ton of things as well as being a sac outlet for artifacts in conjunction with her enchantment as well. Maybe blue is not needed, I know you like the idea to give hexproof with Padeem to an enchanted by
mechanized production but you need more than two cards to justify the color. You either need to add more blue spells and you have tons of options going from
metallic rebuke to
maverick thopterist, or just stick to RB aggro burn.