Suggested cuts: Waste Not - enemy discard is a secondary strategy, and viable, but this is a card that is only a payoff for a secondary strategy. I think it may be dead enough that it doesn't warrant a slot.

Logic Knot - would be sweet if it was {U} less. As is, it's a strictly inferior counterspell that uses a valuable resource to be effective

Fervent Denial - 5 mana is a lot to hold up, 7 will almost never happen in a board-presence focused deck.

Dark Deal - wheels are decent here, but this Mind Rots yourself. Have 4 cards, cast this, end up with 2. The other wheels can benefit from enemy high card counts. This does disrupt opponents, but that's gonna draw some ire and you just binned half your resources. If you can withstand the ire you should be winning anyway. Something like Frantic Search would be better IMO.

Zombie Infestation - two cards plus one upfront is a steep price. I don't know that you have enough reanimation to need to dump your hand at instant speed when you already have Varina available.

Dismantling Blow - a glorified Disenchant 90% of the time. A 6 mana spell the rest of the time.

Suggestions not many at this stage. Gleaming Overseer is a consideration if you find yourself heavy into tokens. I'm a big fan of a few cards in your maybe list: Obsessive Search, and Kindred Discovery. Though the latter is slow.

Matzalantli is cute but I'd be wary of labelling it as ramp when assessing your manabase given it needs 7 mana to activate, and won't be online until at LEAST turn 5. It's defs more a Gilded Lotus than Arcane Signet