Invasion of Amonkhet Krydle of Baldur's Gate Phenax, God of Deception Oona, Queen of the Fae Mind Grind Soaring Thought-Thief Glimpse the Unthinkable Duskmantle Guildmage Umbris, Fear Manifest Ashiok, Dream Render Traumatize Lands Dimir wants a lot of lands that produce black and blue mana , and there are lots of those to choose from
Budget Accordingly: Cards in slightly lower conditions (e.g., Lightly Played) are often more affordable without compromising playability
Veloci-RAMP-tors game plan may be less new and exciting than something like Blood Rites, but it is reliable and powerful as a tradeoff
Theres also a hefty dose of my own opinion here, and Ive not played with or against every deck
Upgrading Exit in Exile Exit in Exile is a fairly well thought out deck
A reprint from the shock lands like Watery Grave and Steam Vents affects Pioneer, Modern, EDH, in terms of card availability, but it wont change an established metagame because the card was already legal there