Curing him would probably require either convincing the djab to release him, or defeating/destroying the djab.
Which, coincidentally, is something we aim to do. However, we may not want the prior captain to be in a position to want his ship back?
And remember, this guy was a big time slaver. He's not a nice person.
I don't think Blaise yet knows he was a slaver or that the Coral Curse was a slave ship- he hasn't yet shared his distaste for slavers, unless that might have happened in our missing three months. We were *just* starting to share though... if it comes up now...Wait... he was a slaver? I was not aware of that fact.
Blaise is immune to disease so feel free to send him in alone. He always enjoys time alone with slavers.