I think it's quite probable that Thraxius decided to found his own Medicae bay, because Genetor Anthium is obviously a heretic, and probably trying to increase the mutation rate instead of lower it.<br/><br/>As for finding something to do, you could work on trying to find some kind of Ultramarine artifact, or escalate your theological debate with the senior techpriests in hopes of creating a splinter faction that can help crew the<em>Valence Pyre</em>.<br/><br/>One option to exorcise the ship, though a drastic one, is to completely remove the fuel supply, set the plasma drive to self destruct, then rebuild the ship after its interior is entirely purged by atomic flame.  More expensive than exorcisms, but nothing will be left aboard the ship either.<br/><br/><br/><br/>As for your servo-skull, if you fail a medicae roll to provide long term treatment, the skull gets a medicae roll, and if it succeeds, it warns you that you're going to harm the patient, enabling a re-roll.