For a card like Argentum Armor, that practically generates 10 mana
This card absolutely terrorized my Commander games when I was 13, and I fully expect to have to play against it again soon enough
Even once its equipped, it feels pretty slow compared to other powerful Equipment like Embercleave
I count: 36 lands and Etherium Sculptor, Scholar of New Horizons, Wreck Hunter, Solemn Simulacrum, Sol Ring, Arcane Signet, Azorius Signet, Dimir Signet, Liquimetal Torque, Orzhov Signet, Thought Vessel 47 mana
As a continual source of Food tokens and a fairly aggressive lifegain payoff, you could do worse than Hurska Sweet-Tooth
It may need to come in the form of subtle reprints and reworkings, as we once saw with Barren Glory or Flame Spill