I think we should look at the rageblade rework for what adaptive should look like

With %damage values it makes all champs viable, including hybrid champs, where it doesn't make it feel clunky when your taking a hybrid champ like jax or kayle for example.

It also scales well on all damage type champs, and takes damage away from certain tanks that would abuse it.

We can also use this as a basis for a %defense stat idea for tanks. Solidifying they're hp stat.

This would be a good way to balance certain parts of the game with certain champs unable to abuse the system