you can always try experiments if you have done priest and peril and started creature of fenkenstein, with your strength level and an sarasword or whip, they are like 45k-50k strength xp/hour, and with your defense I doubt you would even need food tbh, no drops tho but no cost either and easily bottable without many ppl interupting you, easy to find a world with nobody there.
Remember, do not fight the higher level horse things, only the spider and sheep ones cuz you can only kill a few of the higher ones cuz they drop a quest related key and once u get it you cant hit them anymroe