Swarming Artifacts

I like this idea. It's pretty cool. From what I can tell, you have a lot of cheap creatures that you will sacrifice and recycle until you beat your opponent into submission. You got a lot of cheap creatures which would really help in speeding up the damage. Here are the cards I think this deck could benefit from.

- Grave Pact: Your creatures are going to drop like flies whether you want them to (by sacrificing them) or not. Might as well ensure your opponent is feeling the pain every step of the way.
-Ornithopter and other free artifacts: Makes your deck that much faster and it would help cards with affinity. Flying blockers are always welcomed.
-Cranial Plating: You could traditionally equip it before you attack, but the best way to use it in my opinion is to send your guys to attack first and play the BB cost to equip it instantly and reap in the benefits.
-Artifact Lands: Always good in any artifact deck.
-Different Dual Lands: You have a bunch of low cost cards. I don't think you're benefiting much from using Dragonskull Summit.

Here are the cards I have concerns with:
-Buried Ruin: It sets you back a bit. It's good to be able to get an artifact back from your graveyard, but you're losing land in doing so. Therefore, you're putting yourself behind the mana curve and making it unnecessarily more difficult to play that creature afterwards. There's lots of other cards that would bring artifacts back into your hand without setting you back in the long run.
-Epochrasite: I don't think it fits well with this deck because the only way you'll get it in play as a 3/3 with this deck is through Trash for Treasure since all the other cards only brings it to your hand and not into play.
-Steel Overseer: Its benefits will take too long to really be appreciated in a game.
-Vault Skirge: Doesn't fit into the theme you have going on.
-Signal Pest: It's not a bad card here since it's cheap and gives all your attacking guys +1/+0 but I think you could do better with a different card in its slot.
-Dragonskull Summit: You have a lot of cheap creatures and spells so I don't think you really need the speed that it offers.

The cards I think really plays to the theme of your deck and should definitely be kept throughout your upgrades (unless there are better alternatives) are as follows:
Disciple of the Vault
Frogmite
Memnite
Myr Retriever
Myr Servitor
Shrapnel Blast
Trash for Treasure
I honestly would get 4 of each of those cards.

Well that's all for now. Thanks for taking a look at my deck.