Marsh

remarkably easy to kill with melee for their level, and very responsive to poison. Although they can be ranged and maged, (there are safe spots on upper level with second tortoise), range is not very effective (1-5s for me compared to 14-19 with same equipment killing blue dragons), and mage only moderately so. Much much easier than lower level warped terror birds. I required no prayer and very little food. There is one spon near the entrance, where if u kill tortoise there, u can't pick up drops, but rather u exit the sewer.--