b3 Killian Decisive Mentor - What to cut and replace?

Here is my Deck: https://moxfield.com/decks/Yf6fAY3UcXOgxAKVYWExPA

The general strategy of this deck has been to soft control the board with goad, pillow forting, and eventually winning with a powerful Killian (or other creature). It's been pretty ok, but I know the deck could use some improvements.

I have had a lot of luck with the curse cards, which I know are not all that popular. Curse of Misfortune has been nice, but admittedly there are not that many great white/black curse cards(I think I have all the decent ones within there). Similarly I'm not sure about my ramp, if I'm running enough/too much protection, and maybe some of my creature picks. Heavenly Blademaster seems like a strong game ender potentially, but at the same time maybe not since I generally try to win via commander damage. I've considered added Doomwake Giant for more board control, but I'm not sure.

This deck originally began as an Eriette of the Apple deck, but found it was far too slow and moved to Killian. I removed most of the life gain stuff off of it, but kept enduring tenacity (which probably is not doing enough for me to warrant the cost. When I do get life link he is great, but that doesn't always align).

Game changers and all cards are pretty open to being changed here.