MS is going to be all over the actual haunting since that's p much what he does. Obviously he's going to be going over legit anything that seems suspicious, but he tends to look for odd behaviours in spirits - for example, what people or objects to they pay particular attention to? Are there other individuals in the house that the spirit(s) are particularly malicious to? Or the opposite - are they making an effort to protect someone? Are there rooms that are locked/sealed that may hold significance? I'm assuming the haunted house is abandoned and kind of shabby - is there anything that looks as though it's been cared for or out of place? He'll be setting up the scales to track the spirit(s) movement - will there be rooms they seem particularly attached to? (idk I'm trying to cover all the bases with what he'd generally pay attention to and look for)