you should be strong vs. fire. Have your entire party go after the three enemies that are isolated. The tree farthest from you in this area has a Charm of Health. On the other side of the bridge, again destroy the farthest tree for a Charm of Defense this time. Finally, destroy that rock over there for a King’s Helmet.
After you clear that area out the enemies from the other side should be nearing or across the bridge. Head back that way and start taking them out, using Son Goku to Cloud to the other side (you could fly Ryorin or Kikka over there too). Pyric isn’t too difficult when he’s surrounded, like most bosses.
Pine City
As you enter, a Conjuror will stun Ryorin and Reikan will take her away. He then flees and the party is set to go after him to get Ryorin back. Before you leave, be sure to go to the Pine City store and buy some armor for Sanzo and some spells if you can afford them, although you’re probably broke from the last village with spells and the smith.

Have you ever wondered about Sanzo?
Great guide