Look for abandoned houses, beehives are in there. The honey is useful for potions and also serpent stew if you bag a sea serpent.

Get a lot of flint arrows. You can then stand on the other side of a column when he uses his ranged attack to block most of the projectiles. When he summons vines from the ground, sprint behind the next column and repeat. Its probably a good idea to put down a portal nearby as well.