Jax buffs that would in my humble opinion, make him more viable as a top lane pick (or even mid)

Slightly increase the cooldown of his W , but give it AOE magic damage in a large radius and a slow that lasts 2 seconds and slows by 40%.

Give him more HP and have it scale slightly better. Jax has less base HP and Armor than most top lane picks, such as Darius, Fiora, and every tank you can think of.

Increase the mana cost of his E, but increase the amount of time the enemy is stunned to 1.5 seconds.

Have his Ultimate scale better with his AP to give him better magic resist (only 20% is kind of low and defeats the purpose of it really being there). Raise it to at least 30% since his armor is increased by a flat amount + 50% of his AD.

Have his Q also apply magic damage on hit, it's kind of his niche so why not?

I feel like this would give Jax a better time as a top lane pick as he has to play extremely safe and can't trade/duel effectively unless the enemy top laner isn't playing very well. If these buffs seem unreasonable, please tell me why, I want to discuss this extensively :)