You start it on two accounts, one is the eater one is the trainer. All it will do is go to duel arena withdraw a inventory full of food challenge another player on the other bot and they will fight eachother, one account will train on the other account till they run out of food and then repeat.
Can be good xp an hour and ban rate has to be non existent right? For way more xp an hour you can use saradomin brews.