It is fairly easy even on hard difficulty if imma be honest. Send Site-assistent to find a ghost room, This allows even you to check for tempetures in the rooms, meanwhile take UV light and EMP reader, on you find ghost room, set down the cauldron, turn off the light and check for ghost orb. Go back and if you need than take other equipment or just go locate a bring all the ghost objects somewhere, you can find them easily. Identify correctly and basically you won... The game for me is rather time consuming