I finally finished the object deletion. After deleting object 61 and looking around for anything strange it accidentally became clear to me why for the temple location in Last Ninja John could not reuse what after deletion became object 64 (originally 65):
Simply put: the clipping mask as per image above includes the top of the right pillar (which is part of the encompassed object itself). That would have been wrong if Armakuni were to step in front of it as his head would have been half cut 🙂
BTW, object 61 is a bit of shadow which is not visible in the temple location as it was moved out of the play area.