I just had a revelation. What if we replaced Aatrox's ult with a modified version of Sion's old ult?
In his lore, Aatrox is said to inspire violence in the soldiers that he fights with.
Giving some of the health that is stolen to his team members would incite them to continue fighting.
It would give him a burst of sustain and damage for the duration, allowing him to survive battles easier.
Thoughts, summoners?