Warframe - Sedna Boss Fight: Kela De Thaym (Solo - NIGHTMARE)
A fight with the Kela De Thaym on Sedna (Nightmare Difficulty).
I decided to go with Ash / Ash Prime for this for a couple of reasons. His Smoke Screen ability with maxed duration, and his Shuriken ability combined with the Seeking Shuriken mod which deprives the target of armor for a few seconds. With those two abilities used in this fight, it's pretty much a piece of cake.
I used Ignis as primary for it's innate Punch Through depth of 2 meters, which makes quick work of the rotating puzzles. Instead of waiting for the hole to align to a green button that you need to shoot, this awesome flamethrower will just punch through and do it's job.
Seeking Shuriken
http://warframe.wikia.com/wiki/Seekin...
Warframe: Ash Prime
Primary: Ignis
Secondary: Twin Grakatas
Melee: Tipedo