Remember that it's a beast, so serrated weapons are ideal. As the article says, Saw Spear is good for this fight on account of its range (Saw Cleaver loses its serration bonus when extended), but the other choice weapons are Threaded Cane and Church Pick. Focus attacks on its head, and bait its standard bite attacks. Keep pedaling back, attacking only when you're sure it's done with a combo, which may consist of up to two slow bites, then a third, much more abrupt bite. The series of flaming nibbles is also easy to punish, but be careful not to stay too close (it has longer range than you'd think). Once its noggin cracks and starts leaking lava, you know you're on the right track. Pretty simple, just intimidating at first.
If you happen to find it as a standard enemy in a cursed dungeon patrolling a swamp full of oil... Pray.