There's a lot to think about when constructing a mana base
The deck additionally features a number of acceleration spells including mana rocks (Chromatic Lantern, Gilded Lotus, Arcane Signet, Blitzball, Commander's Sphere, Sol Ring) to help accelerate out your spells and allow you to cast them ahead of curve, as well as removal spells and counter effects (many of which are costed to trigger Y'shtola) to deal with your opponent's largest threats
But still, I don't think this will see any play
Heres an example of what a Eureka deck might look like nowadays: Creatures (13) Planeswalkers (2) Lands (20) Spells (26) Even setting aside the Reserved List , Eureka would be pretty near the top of the list of cards never getting reprinted in a Standard-legal set
Mount Olympus could power up all Hercules characters, for example