The Sea Troll Queen is known for her ability to drain a combatants Prayer. This means that any form of Prayer is useless against her. In order to defeat the Kracken Boss, you must use a Ranged or Magic attackstyle. This is because the Sea Troll Queen and her two minions, Giant Sea Snake, are both sitting in the water of the boss area. If you are trying to do the most damage, it is recommended to use maximum +Magic stat gear with a Creature Combat Potion to increase your magic level further. However, using +Magic gear means your Defence stats are low. Therefore if you are trying to last longer, it is recommended to use Ranged gear, this will result in less damage but higher +Defence stats. The decision is up to you.