Math and personal experience indicate to me that you'll want to start with 10-15 ramp cards and tweak from there
Lashwhip Predator Rating: 4/10 Its a little too expensive these days to cast Lashwhip Predator for 6 mana, but the cost reduction should come up pretty often
That makes it the biggest since Core Set 2020

Table of Contents show The Deck The Haunt of Hightower | Illustration by Lius Lasahido Commander (1) Planeswalker (1) Creatures (31) The Haunt of Hightower Shard of the Void Dragon Phyrexian Obliterator Grief Gisa, Glorious Resurrector Sheoldred, the Apocalypse Varragoth, Bloodsky Sire K'rrik, Son of Yawgmoth Sheoldred, Whispering One Gray Merchant of Asphodel Burglar Rat The Raven Man Plaguecrafter Virus Beetle Braids, Arisen Nightmare Demon's Disciple Rankle, Master of Pranks Tourach, Dread Cantor Necrogoyf Cunning Lethemancer Rotting Rats Hypnotic Specter Mindslicer Solemn Simulacrum Stronghold Rats Gravelighter Skullslither Worm Liliana, Heretical Healer Chain Devil Bloodhusk Ritualist It That Betrays Instants (10) Vraska's Fall Sheoldred's Edict Liliana's Triumph Soul Shatter Hellish Rebuke Pharika's Libation Infernal Grasp Deadly Rollick Tragic Slip Black Sun's Twilight Sorceries (11) Smallpox Pox Dark Deal Syphon Mind Vicious Rumors Mire in Misery Awaken the Erstwhile Mind Rake Delirium Skeins Torment of Hailfire Fraying Omnipotence Enchantments (4) Waste Not Court of Ambition Necrogen Mists Dictate of Erebos Artifacts (6) Geth's Grimoire Lightning Greaves Expedition Map Sol Ring Jeweled Lotus Nyx Lotus Lands (36) Cabal Coffers Cabal Stronghold Urborg, Tomb of Yawgmoth Castle Locthwain Tyrite Sanctum Geier Reach Sanitarium Swamp x30 I tried to split my attention between discard and sacrifice effects for this build

Archived from the original on 2022-01-24
It even has some solid midgame value on top of that