Zilean's New Rework

Hi, before I start, most of what I'm posting are ideas that will help champions to be more fun and create a diverse meta. The numbers can be changed since it's not concrete but the idea is what counts. So here it is:

Passive: On top of his old passive New: Reduces cooldown of all allies range of 100 - 600 (range gets bigger based on levels) by 1 - 0.1 seconds (decreases as leveling up) each time a spell is casted in range. For Zilean, the cooldown reduction is flat 1 second but this cannot reduce W or R ability.

Q: Time bomb. Same thing but he has the option to automatically use a 2nd Q at the cost of 35 mana (Like lee sin spells). Then he is unable to use his 2nd time bomb for 14/13/12/10/9 seconds. The original time bomb cooldown and stun duration is the same. MAGIC DAMAGE: 55 / 95 / 145 / 210 / 280 (+ 100% AP).

W: Going to the past. Targets himself or an ally to move (go back in time) where the champ or himself was 3 seconds before. This has a 1 second delay. An indicator will show where the target is teleporting to. Cooldown: 14/13/12/11/10

E: Time Warp. Zilean bends time around himself, Slow icon slowing all enemies or hastening all allies in range by an amount for 2.5 seconds. This is toggled to either slow/speed enemies/allies so it cannot do both. SLOW/SPEED BOOST: 25 / 30 / 35 / 40 / 45%. Range: 100/250/400/550/700 Cost, mana, cooldown are the same.

R: Chronoshift. Zilean places a protective time rune or a harmful rune on an allied or enemy champion for 5 seconds. If an ally takes lethal damage or if an enemy does not take lethal damage during that time, they will be placed in stasis, making them untargetable and invulnerable. After 2 seconds, the ally is revived or an enemy slowly loses a set amount of health in span of 5 seconds. The enemy however cannot have lower than 1 hp. HEALTH REGAINED/LOSS: 600 / 850 / 1100 (+ 200% AP). Range, cost and cooldown are the same.

So basically, I took out his W ability and put it in the passive. He has a new W ability where he lets an ally or himself go back in time. This allows to peel himself or the champ more useful as a support.

His time bomb spell is the same thing, except now the cooldown for both 1st and 2nd time bombs are automatically reduced when leveled because you don't need to level your W to reduce it. The scaling AP is slightly increased but base damage is decreased. The bomb is going to be more used around level 3 and 4 and it's op when maxing Q. His late game will be stronger however.

For his E: Time Warp. It's the same thing except it has a range. Either slow a bunch of enemies or speed allies (like SIvir's Ultimate but lesser degree). This allows zilean to help all his allies speed or slow down enemies.

For his R: chronoshift. It's the same thing except now enemies can be casted as well. They lose health for some time but cannot die. This could result in interesting plays and especially killing tanks becomes somehow viable, giving him a presence in the tank meta.

Conclusion: I have done some research and concluded that his 1v1 is OP but is awful late game. With more diverse abilities, he will be more useful lategame.

If you have feedback, then state below but please read carefully as it took a lot of time and thought before you feedback.