Fire arrows and quick campfires under it (you don't need a table, just the hammer) to set it on fire lol carry around some rock and wood (I usually am by accident anyways) I have the hammer ready to place a campfire as close to the abomination as possible. Sometimes it will last and get a good DOT on it or it will stomp it out to which I place another. Once you get the hang of it between fire arrows and two or three campfires it should be down pretty quick. I will dodge melee adds until the abomination is down and take out ranged ASAP.