I have never used it, but are you sure you have the creature amount to make Scrapheap Scrounger worth it, 4 of them?
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crackdown construct + wandering fumarole then fling too
each diabolic tutor in this deck is like having an extra Pia's revolution since you can go fetch it with it and you REALLY need Pia's R to get this deck going.
I thought about some 0 cost artifacts, but Foundry Inspector can do that for me, plus most of mine are only 1 or 2 cost to begin with. with implement and terrarion i can draw a card every time it's sent to the graveyard so i shouldn't be aching for land if it goes well. I have toyed with the idea of renigade map and might add some at the cost of a terrarion and 2 lands or maybe just no terrarion and 3 lands. that's a card I actually have to use it's ability to get the land tho, so sacrificing it to ravenous intruder seems like a waste.
if you have 1 pia's revolution i would take the 3 damage every time because without your artifacts you have nothing that scares me, your gremlin's would be useless and you can only draw one card a turn so your not gonna have a handful of them all the time. plus if i have flying your gonna get crunched in a few turns. BUT if you have 2 pia's revolution if I send it to the graveyard i'd have to take 6 damage(yes 6, i saw the comments above and each pia triggers and nothing fizzles and then once i'd choose to graveyard it then it would resolve into 6) and if i had to take 6 damage i'd give it back every time and hope i can block until i can get something to take out your gremlins until then. you have a serious lack on flying defense though, have you considered freejam regeant? or even hope of ghirapur? that's a fun card.
Have you thought about adding Diabolic Tutor? It would help you get a Pia in your hand if needed. Or maybe adding a Metalwork Colossus to have a big nuke card if ya need it that Diabolic Tutor could put into your hand. I'd go with -2 Instants, one of each, and -1 Marionette to add 2 Diabolic Tutor and 1 Metalwork Colossus. Those cards would still keep it a Kaladesh/Aether Revolt deck too.
Just made a revolution deck myself, but just with red. I toyed with these cards ya got here, but haven't tried it yet. What's ur success with this deck? Check out mine as well and leave a comment.