Mortarion's Sons monstrous women trouble

before we start

Before you say it, yes i know Death Guard are disgusting but I'm planning on a plot point to change that up, returning them to a un-nurgly state. I'm also making the monster women op as fuck so they don't get their asses kicked by some sick bois.

And with that what monster girls do you believe would best for them?

Also some details about the main main character of this tale.

Name: Serok Hakioss
Age: 649 terran years
Death shroud terminator
Despises nurgle but follows his primarch.
Despises his battle brothers and his cousins.