You know if we are going with the escape from roof-top scenario the plan could be to take Merrik and escape so we have time to talk/torture him afterwards. Might even help us from getting shot down if we have problems with the security system. Surely they won't blow up our ships if there is a possibility of killing him.
Also Xavier is going in a dark brown suit mafia style complete with over-sized trench coat and fedora if that's possible since he is part of a crime syndicate 😄