I suggest running
Windfall,
Jace's Archivist and
Dark Deal as well as any other good wheels you have (Maybe
Time Reversal ?) and trying to run more affects that work based on mass discard like
Geth's Grimoire (if you're feeling really mean
Notion Thief) ,
Megrim and Raider's Wake. If you don't like that style of discard I would still upgrade your counterspells to actual
Counterspell,
Counterflux,
Mystic Confluence or
Arcane Denial. I would try to play more cards that say each player/opponent discards a card like
Rotting Rats,
Delirium Skeins or
Neheb, the Worthy so that you don't get blown out by the opponents you aren't targeting. That said, the specter subtheme is really cool so if you want to stick with it that is very flavorful. I would replace
Wild-Field Scarecrow with
Burnished Hart and/or
Solemn Simulacrum. While
Metallurgic Summonings is on the No-No's list, it actually isn't bad if you switch to a more spell based version of the deck. You have some artifact deck themed cards like
Contraband Kingpin, and I either recommend going pretty all in on that theme by playing a ton of ramp or avoiding it and cutting those cards. I think you should play
Gilded Lotus,
Sol Ring and all of the signets in your colors anyway, either way. I would definitely keep
Dragon's Hoard, and
Creeping Dread of off your maybe list;
Izzet Charm is solid too, but the rest could use some changes possibly. I might upgrade your card draw by replacing cards like
Foresee with
Mystic Confluence, or
Fact or Fiction. You seem to need some more wraths for the deck, and I think
Blasphemous Act is a very good option, but the coolest options out there for your deck are
Crux of Fate and
Hour of Devastation. These cards don't hurt your commander too much, and they are incredibly flavorful.
Dark Intimations is a little bit high on the mana cost for its effect, but it very powerful and flavorful in your deck. Sorry for the long rambling comment, but the deck looks very cool and could be very good with a few upgrades. Commander decks are for fun, so if you want to keep any of the cards or strategies I suggest cutting, just do it.