Throne Defender and Throne Watcher are yet another example of poorly designed ganky bosses. Individually they are as difficult as a Hollow Soldier, but together they combine their odd hitboxes, erratic movements and resins to become a mayor annoyance. Fight unlocked, kite them around the arena and attack the first one that tries to hit you. Hit the foe once or twice, always watching out for the other one. Don't let them corner you and watch your step, for the arena is sorrounded by a chasm of death and frustration. Don't focus your damage on a single boss. If you kill one of them too early, the other will revive him/her. Instead bing both their health bars down to about 30%. Eventually, they will buff their swords and will dish out more damage. However, their attacks won't change that much and the Throne Defender will even throw his shield away, thus making it easier to damage him. Finally, take one boss down and watch the other closely. When you see the Defender/Watcher kneel, attack them with all you've got.