Zilean kit fixes

Zilean's recent rework, while much better than his prior kit, still has some fundamental flaws. I wanted to point some out and add some suggestions. Would love to hear anyone's thoughts.

Passive: Time in a bottle "Zilean generates 2 / 3.5 / 5 / 6 / 12 experience every 5 seconds, which does not advance his own level. When he has enough to level up an allied champion and is out of combat, he can right-click them to to initiate a 1 second channel, after which he grants them enough experience to finish their level and receiving the same amount. If the channel is interrupted, Time in a Bottle goes on cooldown for 2 seconds. Time in the Bottle starts the game on cooldown."

While this passive encourages team interaction and can provide a crucial level, it has no late game benefits. I feel it needs some use post 18, or even pre that can benefit him as a carry.

Idea 1: allow a self cast that restores mana based on {stored experience X percentage missing mana}.

Idea 2: allow Zilean to break the level 18 cap with a new cap of 20. This concept is similar to Kog'maws niche of breaking the AS cap. Adding base stats to every champ to accommodate this passive would be too tedious so I propose it be worded like this; "Upon reaching level 18, Zilean can cast Time in a bottle on himself allowing him to cap out at Level 20." This would change his scaling ratios to a degree and I think would be interesting but not as practical as the first idea.

The next kit idea is with Zilean's Q. It is his only source of damage and while coupled with his W and E have a great concept can feel underwhelming. I propose his first Q cast empower his other abilities (only if cast and attached to a champion ) adding an extra boost similar to how QQ will stun the enemy champion.

Example idea:

E: Empowered Time Warp :

Allied Champion Cast: Time Bomb Timer is shortened to 1 count. Upon exploding ally's movement speed is increased by a percentage.

Enemy Champion Cast: Time Bomb timer is slowed along with enemy champion. Upon detonation deals bonus true damage/AP damage/larger damage range.

R: Empowered Chronoshift :

Allied Champion Cast : upon reviving, time space explodes dealing Xx damage in a Xx radius.

Enemy Champion Cast : After Detonating, Time Bomb reset with 1 count, twice. Each consecutive detonation deals % less damage.

So yes these are concepts that adds tremendous utility to Zilean's kit while adding variety to how he plays as a carry. Would love to hear suggestions and would love riot to add to a half finished kit rework of Zilean.