Aatrox with two health bars (like Kled)

Some time ago Riot was discussing about Aatrox and he's been my favorite top laner for a while now, i really love his look, lore and gameplay, despite being flawed.

They said they want him to be a diver, and his passive could be reworked toward that end.

Instead of being a free guardian angel, it could give him a second health bar, similar to Kled. His second health bar would be ''reserve health'' scaling only with level, and his regular health would just be stacked over it. When his regular health is depleted, he starts tapping into his reserve health bar, and a timer starts. Similar to Sion's second life, his reserve health would start depleting faster and faster, until it reaches zero, then he dies.

Aatrox can save himself from death if he heals HIMSELF (would be immune to allied healing while tapping on reserve HP) above his reserve health threshold, at which points he is able to survive.

The enemy has two choices at this point. Either ignore Aatrox and leave him to die as he is unable to sustain himself, or burst him down.

Such a passive would preserve the identity of his current passive, while helping him being a better diver, and also strengthening his identity as a lifesteal champion. It would also fit his lore really well.

I don't even care about what they do with the rest of his kit, as long as he remains a diver that survives through lifesteal.