I really need help with KEM farming induced levelling!!

Unfortunately the only thing that you can do with all the multiplier items is to try and hide them the best you can, that's one of the reasons why I stopped at around a 1700% multiplier as I still like to decorate around all my house's and buildings and with the item count limit it's a balancing act, as to the limit I can't remember exactly but it's around 10,600.