Run on the wall and use Hand of Ormazd ability. If you go on the wall, you should get to another Power Plate.
Go inside the elevator and turn the windlass until you reach the top. Here Elika will be temporarily immobilized.
Come up to the Concubine and attack her. Unfortunately, its only her false image. Run on the wall and jump on the column.
Go to a higher level using the ceiling and jump on another columns to get to Concubine.
Attack her but it is a false image again. At the same time Elika will be freed so you need to use elevator again.
When you are on the highest level run right on the wall all the time.
You will use Hand of Ormazd ability couple of times. You have to use Elika's ability to throw you to the wall as often. In the opposite case you will fall down.
Go to another level by using the crack in the wall.
Use elevator again, but this time you need to go to the top and defeat Concubine.