[Champion Concept] Mid Mage/Hybrid Champion

We have some high-mana capacity champs that are pretty much useless without mana. (Ryze, Cass, Kass, etc.) With this champ, it would leave another viable option to counter these people with a fun play style. I'm aiming for this champ to be a hybrid, like Jax but ranged. And obviously a different kit. No lore yet, but still WIP.

Q: Select a target, deal 100/150/200/250/300 (.3 AP), slow for 10/25/40/55/70% for 2 seconds, unless recently hit by E active, then stun for 1 second. CD: 15/14/13/12/11. Cost: 70/120/170/220/270 mana

W: Passive- Increase mana by 6/12/18/24/30% Active - shield for 6/12/18/24/30% of mana for 4/5/6/7/8 seconds. CD 15/13/11/9/7

E (toggle): auto attacks do 5/10/15/20/25% (.2 AD) more damage, cost: 20/40/60/80/100 every auto

R- Deplete 12/24/36% of enemy mana pool, replenish your own mana, any excess is then applied to HP in a .5 ratio (for every 1 mana, .5 hp is restored.) Do damage based on half of mana depleted, with a .25 AP & AD ratio. CD- 100/90/80. Cost- 200/400/600 mana

I have another Champion Concept, and I will leave the link below this! If you could think of anything to add, leave a comment and if you liked this post, please upvote this one and any other I have come up with!

[Champion Concept] New Support Champion: Click Here!