Sa'Dax Senshali (Advanced Solo)

Strategy
Sa'Dax will periodically throw shards of Dark Luclinite on the ground. Click them to remove them. If you aren't fast enough, they explode, doing fair damage and a knockback.

At 75%, 50% and 25%, Sa'Dax will teleport into the air leaving 3 colored spheres (red, yellow, and blue) behind. An emote of either green, yellow, or purple will appear on your screen, and you have to click the two spheres that combine to form that color (e.g. red and blue for the purple emote). If you fail, you have to fight an add.

If you succeed, you're teleported up to a small platform. The platform will cast a debuff on you depending on which color it is. Sa'Dax has a stoneskin buff while on the platform. Target and kill the platform. Once you fall, you may have to pull Sa'Dax around a bit because the game seems to have trouble with the Z-axis in this fight.