By the time Uriel was about to hit the ground he had recovered enough life essence to regenerate his missing leg and then some more thanks to the many wounds he inflicted on Mark, but although the fight seemed to be long, it was actually in the short span they fell which meant Uriel did not have enough time to heal.
Rather than being concerned by nearing the ground at such speed, Uriel dislodged the dagger from his target and attempted to hurl it away in an attempt to anchor the blade to something, but the eclipse did not allow it and it made sure to block the dagger's path which left Uriel with no means to stop himself from falling.
In Mark's eyes it was his victory, since thanks to the eclipse he would be able to withstand most of the fall damage and regenerate almost instantly. Something Uriel was not capable of doing, not anymore at least, and no heavenly rank hunter could survive a fall from that height.