This was more tedious than I liked. But I have amazing tips!

Water. use your strength char and carry some water barrels and water bottles.
- throw water at your party to make them wet. Makes running threw fire an absolute breeze.
- throw water at the trapped guy to prevent him from catching on fire
*don't forget the locked chest in the next room, pick it up and open it later
- break open door right next to trapped man
- activate log on trapped man, if you fail the check get someone else to do it and I believe it automatically passes, if no, you can destroy it.
- his pathing ai is even worse than your companions here. He got stuck getting him outside the door, giving him a good throw in the right direction fixed it for me.