These are Multifaction/factionless cards that I believe are safe to dust. If a card appears as less than an x4 it’s because I believe it does/could see play as a market card or tutor target and you should keep 1.
The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.
Great question! Yes after the ECQ this weekend I will have a more informed idea of where all of the cards are at. And probably Monday all of these lists will be revised =)