Finally beat him with my Scourge The trick is stalling him first until breakbar shows, This is how I do it: I put [sand Flare], [Flesh Wurm], [sand Swell], [spectral Walk], and [Flesh Golem] on my utilityThe weapon is scepter-torch and armor is full Trailblazer Phase 1: At enter, Put [Flesh wurm] at the side of the arena (let's say right side), then prepare the [sand Swell] on the left sideWhen his red-name pop up above his head, count until 3 second and teleport yourself using the sand swellSpam "F" key to teleport between portalUse your healing [sand Flare] as much as possible since your health will likely always on below 50%Phase 2: (Sand Swell end) When your sand swell portal no longer available, run using [spectral Walk]Prepare to hit Turai Ossa with your scepter 3 (Feast of Corruption) as soon as his boon up to corrupt his boon such as 25 might and othersReturn to your initial [spectral Walk] position when he is close to youUse your [Flesh Wurm] when he is close to you againSummon [Flesh Golem] and prepare for Phase 3Phase 3: (Turai Ossa using his ground slam skill) Turai will use ground slam on the center of the arenaWatch when he using his throw-weapon on youEvade it (otherwise he will gain his buff again)His breakbar shows up -> use the flesh golem knockdown abilityDPS him HARD!Phase 4: (Second ground slam) At some time, he will use his ground slam again on the center, this mean he will be using the throw-weapon againEvade his throw weapon skill againHis breakbar shows up -> use the torch 5 (Oppressive Collapse)DPS him HARD with all your skill to remove his remaining breakbar and kill him(At this point, even if you downed, your flesh golem, the condi you put on him, and downed 1 skill should still enough to kill him)