Just wanted to update where I'm at with this,
4 Forbidden Orchard
4 City of Brass
4 Gemstone Mine
4 Burning Wish
3 Ad Nauseam
1 Necropotence
4 Dark Ritual
2 chain of vapor
1 Lion's Eye Diamond
1 Black Lotus
1 Mana Crypt
1 Mana Vault
1 Sol Ring
1 Lotus Petal
1 Mox Ruby
1 Mox Sapphire
1 Mox Jet
1 mox emerald
1 Demonic Tutor
1 Demonic Consultation
1 Vampiric Tutor
1 Mystical Tutor
1 Tendrils of Agony
1 Brainstorm
1 Ponder
1 Ancestral Recall
4 Duress
3 thoughtseize
4 Chrome Mox
4 oath of druids
1 griselbrand
Average CMC of 1.15 which is 0.05 higher than my original list at the top of the first page(which didn't have a maindeck tendrils). I've only died to CMC damage involving griselbrand once in about 80 goldfishes.
What is the unique benefit of playing ad naus in this deck? Would you be better off with bargain and fewer design restrictions, whether it is the path package from the last page or wheel or another gris and show main/side, at this point the list looks like a wish deck with as naus jammed in there. I'm not sure this list optimizing either package, which is a shame because the raw power of either is impressive.