I think, often with spiriteds, less is more. Start by doing almost nothing, just hold him, work out how he likes to be held best, maybe in a particular position? My LO2 didn't like being held upright, she would always wriggle herself over into a horizontal position. Or, very tightly? Or, not? And then add in just a gentle rub, or a hum, or a whispered word. It may well be that he needs something but really not all that much. A times may help a lot, as if he's ready for sleep, he may need less wind-down.