The first thing Im going to try is just running Nethroi at the helm of my Karador deck
Please remember, these values are subject to change based on supply and demand

Scientists Aang's Journey Abzan Monument Agency Outfitter Analyze the Pollen Archdruid's Charm Balamb T-Rexaur Beamsaw Prospector Bebop, Warthog Warrior Bedhead Beastie Beseech the Mirror Bioengineered Future Biomechan Engineer Biotech Specialist Black Chocobo Bloomvine Regent Borough Backup Brave the Wilds Brightglass Gearhulk Burnished Hart Bushwhack Call the Mountain Chocobo Campus Guide Canyon Crawler Caradora, Heart of Alacria Case of the Shattered Pact Case of the Stashed Skeleton Celestial Reunion Central Elevator // Promising Stairs Central Elevator // Promising Stairs Changeling Wayfinder Circuitous Route Cirina Bargainspinner Claim Jumper Clay-Fired Bricks Cloud, Midgar Mercenary Cloudbound Moogle Colossal Rattlewurm Compass Gnome Cool but Rude Cosmium Confluence Courier of Comestibles Cycle of Renewal Cynical Loner Daggermaw Megalodon Dance of the Tumbleweeds Dauntless Scrapbot Delivery Moogle Demolition Field Demonic Counsel Dina's Guidance Divert Disaster Dragonstorm Forecaster Earthbender Ascension Edge Rover Elemental Teachings Embermouth Sentinel Emergency Eject Emeritus of Woe Encroaching Dragonstorm Environmental Scientist Escape Tunnel Everything Pizza Evolving Wilds Expedition Map Fabled Passage Fang-Druid Summoner Fateweaver Fierce Empath Flourishing Bloom-Kin Formidable Speaker Fountainport Bell

At the bottom of our rankings is the Wizards deck, which doesn't get many good artifacts at all
The Water Crystal While The Fire Crystal is very versatile in Red strategies, The Water Crystal wont go in every Blue deck
General Ferrous Rokiric General Ferrous Rokiric would love it if you went for more colors than Boros, but there are plenty of solid RW cards to make it tick