Spoiler question about Astarion

Spoiler question about Astarion

Had a question about Astarion I couldn’t find the answer to online that I wanted to ask. I’m replaying the game with a Dark Urge character where I’m really leaning into being power-hungry and evil, and I just hit Act 3 and became half-illithid and want to try and convince all my party members to do the same. However, I was also planning on letting Astarion become a Vampire Ascendent and was wondering if him being half-illithid would interfere with that at all. Does anyone know if this is a thing, or can I have Astarion do both?