Kayden - The Conduit v2

I wrote a version of this champ a month ago and it didn't work. So this is the rework.

Kayden; Observant, perceptive, empathetic, and naive. As much as he cares for the people living in the world, he wants no part in it. He sees the good and bad in anyone, and usually sides with people he agrees with. When people need him, he takes initiative. Otherwise, Kayden is one with the crowd.

Mage / Support

Hometown: Piltover Race: Human Hair: Dark brown Eyes: Green Age: 19 Weapon: Wristband, which allows him to make use of blue/green magic. It's a hextech item that allows him to channel energy around him to better his physical capabilities and regeneration.

Design Philosophy: I main Ezreal, but I like playing support. So I made a class that is basically a fun skillshot support. I've made a version of this champion a long time ago. This one is refreshed.

Stats: Same as Ezreal, except: Attack Damage: 5% less. Health Regen: 5% more.

Passive: Unnamed You gain 5% movement speed when you activate Q, W, or E. This bonus does not stack.

Q: Unnamed Active: Kayden throws a bolt of energy at target direction that deals (30 / 40 / 50 / 60 / 70) + 15% AP magic damage to enemy champions and large monsters it passes through, applying basic attack on hit and multi-target projectile spell effects. Mana Cost: (28 / 31 / 34 / 37 / 40). Cooldown: (6.5 / 6 / 5.5 / 5 / 4.5) seconds. Projectile Range: 1150. Projectile Speed: 1750.

W: Unnamed Passive: Kayden and nearby allied champions (450 radius) have +(10% / 20% / 30% / 40% / 50%) Base Health Regen. This effect is disabled while on cooldown. Active: Target allied champion (within 550 range) receives (10 / 20 / 30 / 40 / 50) +50% AP Health over (10 / 9 / 8 / 7 / 6) seconds, and when it finishes, it slows nearby enemy champions and large monsters (200 radius) by (5% / 10% / 15% / 20% / 25%) and deals (10 / 20 / 30 / 40 / 50) + 15% AP magic damage (works only if the buffed allied champion is still alive). Mana Cost: (80 / 85 / 90 / 95 / 100). Cooldown: (24 / 23 / 22 / 21 / 20) seconds. Note: The trigger at the end is based off of the person with the buff.

E: Unnamed Passive: Kayden and nearby allied champions (450 radius) have +(1% / 2% / 3% / 4% / 5%) Movement Speed. This effect is disabled while on cooldown. Active: Blink 450 distance. Mana Cost: 120. Cooldown: 15 seconds.

R: Unnamed Active: Target ally receives +(15% / 18% / 20%) Movement Speed for (2 / 2 / 3) seconds, is healed for (55 / 80 / 105), and gains a (70 / 105 / 135) point shield that lasts for (2 / 3 / 4) seconds. Mana Cost: 100. Cooldown: (180 / 165 / 150) seconds.

Comment your thoughts! :D