Jayas Pheonix Jaya's Phoenix requires a high density of planeswalkers, severely limiting its playability range
They give you easy and consistent access to a powerful land recursion engine, letting you lean harder into the archetypes inherent graveyard synergies
Vadrik seems good even without the day/night tech, as increasing his power is a really easy thing to do
This list is specifically rating the quality of the cards that you play so as to check the life gain box in your deck construction
Nashi, Moon Sage's Scion is a combination of Bolas's Citadel and Etali, Primal Storm as long as it can get in for damage
If we're looking to have our first spell each turn be big, and we're also looking to have a big creature enter the battlefield and turn that creature generate mana through Alena, Purphoros, Bronze Blooded is a natural fit