Muldrotha Alternate Win Cons

[heavy warren]

I need ideas on cards I can add and cards to swap those cards in. The idea is to have it Casual to High Power The idea of the deck is to win through various alternate win conditions. The three are Simic Ascendancy, Darksteel Reactor, and The Millennium Calendar. I do have a two infinite combos but they play off of the similar cards and do the same thing, except one has to target an artifact, and the other targets a land. Infinite mana and infinite untaps. I have no way to abuse the infinite mana combo but can abuse the untaps via The Millennium Calendar. https://www.moxfield.com/decks/N3b3_anCGUSFm2HUi-nqPQ

One card I do want to add is Alchemist Refuge, but I don't know waht to take out for it.

Realized I forgot to add the decklist

[atomic nebula]

Have you playtested this?

I've gone through a 7 turn cycle three times in a row now and the deck doesn't seem to have a functional core to make it... do anything when it doesn't have access to a combo. This bodes badly for when people are actually interacting with you.

Muldrotha doesn't seem to add any value either, since you're not milling, discarding, drawing too much into discarding, or sacrificing many permanents.

I think the concept here is really interesting, but it needs a different approach than just sort of throwing in untappers and "staples"

I think the clearest way to show this is the fact you are running Rampant Growth, but not Sakura Tribe Elder. Rampant is a one time spell you can't really interact with again. Sakura tribe is a one time ramp spell for most... but you can keep casting it whenever you don't need a creature cast from grave and gain way more mana over time, while also having a free block.