1 Firebrand Archer
You have many instant answers in this stuff
I have also retweeked some of the other rates to a lower price point

Adrestia Adventurer's Airship Aerial Surveyor Aethersphere Harvester Aetherwing, Golden-Scale Flagship Air Response Unit Apocalypse Runner Aradara Express Arcee, Acrobatic Coupe Avengers Quinjet Balamb Garden, Airborne Ballista Charger Bespoke Battlewagon Bessie, the Doctor's Roadster Big Wheel Bladewheel Chariot Blitzwing, Adaptive Assailant Bomat Bazaar Barge Boommobile Boosted Sloop Broadcast Rambler Brotherhood Vertibird Brute Suit Burner Rocket Capenna Express Captain America's Motorcycle Careening Mine Cart Cargo Ship Carriage of Dreams Carrion Cruiser Clamorous Ironclad Cloudspire Skycycle Clown Car Colossal Plow Conqueror's Galleon Consulate Dreadnought Cryptcaller Chariot Cultivator's Caravan Cybership Cyclonus, Cybertronian Fighter Damocles Base, Sword of Kang Daredevil Dragster Debris Beetle Deluxe Dragster Demolition Stomper Demonic Junker Dependable Quinjet Dermotaxi Detention Chariot Dodgy Jalopy Dragonfly Suit Dreadmobile Dune Drifter Dusk Legion Dreadnought Earthrumbler Enchanted Carriage Esika's Chariot Fell Flagship Filigree Racer Fire Nation Warship Flamewar, Streetwise Operative Fleetwheel Cruiser Flywheel Racer Foreboding Steamboat Funeral Longboat Futurist Sentinel Gastal Thrillroller Getaway Car Ghost Ark Gilded Assault Cart Goldbug, Scrappy Scout Golden Argosy

The risks you expose yourself to in order to use Rancor (especially now that blue decks are rising in popularity) just dont seem worth it
Landfall abilities are also quite common, even if the majority only provide temporary stat boosts, and you can find plenty of ramp effects to keep them ticking over