Zombies are my favorite tribal but they are far from the most effective. 1. They are extremely mana-hungry. 2. Even with fast mana and lots of rocks they are usually slow yo get started. You have a lot of lands that come in tapped and that will hurt you, especially in the absence of sol ring. If you want your deck to move, as is, cut some of the big stompy stuff to lower the cmc. Then find a good combo throwing a kicked Rite of Replication onto gray merchant. Props to you for avoiding infinite combos. I do too. Your welcome to check my wilhelt build for ideas. Cheers!

I feel like my mana curce is quite decent tbh. What big stompy stuff would you suggest I cut?

I’d swap coldsteel heart for sol ring. I’d put the 4 or 5 cards with cmc 5 or higher in front of me and decide which one had the most value, then remove the other 3 or 4. I’d keep Mikaeus and gray merchant. I play against a lot of 7-10 power level decks in my meta. If I don’t have a solid board state or some decent interaction by turn 6, I’m in a bad spot. If your meta is using a lot of precons and/or 3-7 power level decks you can build slower without many consequences. The hardest thing for me to do in my (3) zombie decks is pick 2-3 strategies for the deck and ruthlessly prune cards that don’t support them, even though they might be fire in a zombie deck. Hope that helps!

no not really. your deck has the same amount of 5 drops than mine. ANd I dont like your tone either. id rather not take advice from you.

So here are my recs:

Apprentice Necromancer, Cryptic Gateway, Kindred Discovery, Coat of Arms, Vanquisher's Banner, Urza's Incubator, Pyre of Heroes, Species Specialist, Dark Ritual, Culling the Weak & Sacrifice

I'm iffy on Corpse Harvester but it could be decent, if not a bit slow.