It will depend on what they can do for him, and how willing they are to sever their past ties to fal in with him. Like Saladin, he would prefer to convert them rather than put them to the sword. I believe he is an intelligent man who would realize a purge would be a bad move. The problem with his over-intellectualizing approach is that he is occasionally too thoughtful for his own good (or ours) and it is much more likely that he will fail to purge advisors and staff that are working against him or the nation's interests when it is apparent to everyone else that the time to do so has come.