I have played most of the delves so far multiple times at tier 11 but Tak-Rethan has been the worst. Both the final boss and Brann himself have been bugged constantly. I have several bugs to report and I warn people against playing this delve, particularly with Tank Brann.
First off, Brann doesn’t work. In this Delve if he is either tank or DPS and takes aggro, he will randomly decide to pick up ore/materials mid-fight and run away. This happens in other Delves though. But there’s more.
Several times Brann has decided to start cha cha sliding backwards 20 feet so we can fight all at the same time 10 sharks, 5 lizard men, a crab, the Underpin, Underpin Well Connected’s Mother, Grandmother, Sister, Half-Sister, In-Law, Friend of a Friend, Brother of a Friend, Brother of a Brother, and whatever else this godforsaken NPC spawns.
Then there’s the final boss Undersea Abomination. First thing I noticed after starting the boss fight, Brann was not attacking. Even after I hit the boss with ten pounds of molten magma for 8 minutes Brann is sniffing the underwater daisies and enjoying the view instead of fighting this swamp creature in front of him. It has a jet torrent front attack that deals no damage at all and does nothing. It has an area explosion with no hit radius displayed, I don’t know if it deals damage I was never hit by it. Undersea Abomination doesn’t melee attack at all. It has a mushroom spawning attack which is the only thing that can kill you, unfortunately I died to this because I was bored and distracted having to kill an elite target dummy. Please fix this delve.