Okay in the pic, you basically cast slow fall. Run your mount to where you will land where I am standing. Dismiss your mount before you get there. No you are in a semi cool but almost useless spot. I am a Arcane Mage so I found a trick with where I am at that is neat. Okay so see the little hole in front of me? Some people won't even notice you and it will be an easy kill. But even if they do you can stand where I am cast a instant AB, side step away from the hole and they can't hit you cause LoS. Just keep side stepping and casting instants and win.
Okay directly to my back is Fel Reaver. The "rails" of the bridge, you go up the right one, line it up and just run and jump off of the rail thing.