Here's a budget version of the maindeck from before ELD... sorry I haven't played since then. I went 11-0 or 12-0 on MTGO with this super-budget-untuned list... so just imagine upgrading the obvious stuff (like Inkmoth Nexus) and replacing Court Homunculus with... anything 0 or 1 CMC. I think All That Glitters and Steel Overseer are worth consideration, but the deck has enough power with Lupine Prototype, Cranial Plating, and Tempered Steel, that it might be overkill. My main ideas were to vomit fully onto the battlefield by turn 3 (so that the turn 2 Lupine Prototype can attack straightaway), be immune to Karny Silence, and have a way to recover after a 2cmc or 3cmc board wipe (Lupine survives and servo exhibitions rebuild fast if you have the Tempered Steel on the field... I considered Sram's Expertise out of the sideboard, and also splashing blue for Day's Undoing):
I think it has to find another way to play out the hand by turn 3. Without Mox Opal, you should remove all the 3-drops and insert the full set of Memnite and Frogmite ("real" affinity cards that will almost always cost 0). With 12x 0-drops you don't need Mox Opal to empty your hand quickly... so much so that when I tested I actually successfully used Lupine Prototype as 2-of (never once was it unable to attack the turn after playing, out of over a dozen matches). Without the powered up creatures, use tempered steel to power up the wide board, which suggests you go monowhite, which makes All that Glitters and Dispatch auto includes.
Maindeck as tested is hyper fast, but weak to turn 3 wraths. Oddly enough it's quite resilient to Stony Silence effects (Karn Creator, Ouphe). Karn Scion comes in post sideboard for the card draw and because it produces big threats that survive Anger of Gods. Banishing Light or Generous Gift come in as white's best flexile removal.
Tested with over a dozen MTGO matches, and am undefeated. I'm not a good player, so either I got lucky with the matchups or the deck is actually quite good.
4 Blinkmoth Nexus
9 Plains
4 Memnite
4 Ornithopter
4 Servo Exhibition
3 Court Homunculus
4 Signal Pest
4 Springleaf Drum
4 Lupine Prototype
4 Vault Skirge
4 Cranial Plating
4 Tempered Steel
4 Frogmite
Maindeck as tested is hyper fast, but weak to turn 3 wraths. Oddly enough it's quite resilient to Stony Silence effects (Karn Creator, Ouphe). Karn Scion comes in post sideboard for the card draw and because it produces big threats that survive Anger of Gods. Banishing Light or Generous Gift come in as white's best flexile removal.
Tested with over a dozen MTGO matches, and am undefeated. I'm not a good player, so either I got lucky with the matchups or the deck is actually quite good.