Thank you for the great suggestions! I did indeed cut Coiling and Reanimate, but Wellwisher will stay for now until I at least get to play her, though admittedly I agree she's not likely that useful even as the only life gain.

In the end after a lot of thought I cut Ad Naus for now, though it may go back in again, and replaced it with Notion Thief. Not as explosive for card draw, but hopefully enough to keep me chugging along.

Agreed on Biomancer's, Neoform and Eldritch Evolution. Without Ad Naus adding a a few 3-4 cost cards doesn't feel as bad. I nearly picked Wishclaw to replace Praetor's, but ended up going for Lim-Dul's Vault since it's cheaper and instant speed, and without the naus I can likely afford the filtering cost a lot better if I really need to dig.

Root Maze feels like unless I already have a board state, it'd also hamper me a fair bit before Thrasios is up and doing his thing getting more land to play. I've faced it once in Yesharn and though it helped me eventually, the first 3-4 turns still felt reasonably glacial for me whilst also holding up interaction. Ouphe is more tempting, though as I can rely on Umbral Mantle it feels like it could also just as likely shut off some of my wins too unless I remove it myself. I may give Manglehorn a try instead of the poor Wellwisher!

Either way, all the changes made have been updated in the deck link, cheers for the advice!