Knights:You should bring some bps of Fire Fields, Just go down the hole and put Fire Fields beside you so only 1 creature can attack you at a time, you can be there forever if you bring enough supplies and are skilled enough. You should bring some Mana potions, they are cheap to heal with and you get some Magic Level % with them, Bringing health potions is advised too incase you get swarmed. Using a Fire Axe on this creature produces more damage than a royal axe and almost as much damage as a stonecutter axe due to this creatures high physical resistance and weakness to fire. Thornback Tortoises mostly attacks in groups with Tortoises and Blood Crabs, so be careful when jumping down holes. Not very good to hunt for mages because they will use a lot of mana/runes to deplete its high hitpoints. Mages should use summons. Mages could bring alot of Great Fireball runes with them, and try to gather a big group of monsters and fire them down. You can easily gain 700-1500 exp like this.