You can terraform A LOT. You'll appreciate the cover if you have raised-land walls all over the place that you can dodge behind and between. I am NOT a good melee fighter but I managed to trash this guy by exploiting the terrain formation tools. He isn't a Fuling; he's big and clumsy. Use that against him. Oh, and build walls around the area of the fight as well, and place workbenches to suppress spawns, to make sure that he doesn't get any help from his little friends during the fight.