Nola will be 31 next year and his velo has ticked down a little year.
Also, he's only averaged 131 innings per year from 2020-2023!
Yamamoto is interesting due to his age, but is on the smaller side. He's supposedly better than Senga and you'd be getting him for his prime he's before he hits 30. I'd lean towards him.
I also don't see DD letting Nola leave.