Chronos arena (looking for feedback)

Chronos creates a rift in time, damaging all enemies in the area.

Ability Type: Circle, Damage
Damage: 80 / 125 / 170 / 215 / 260 (+80% of your Magical Power)
Radius: 10
Cost: 50 / 55 / 60 / 65 / 70
Cooldown: 5s

Chronos accelerates himself over time, allowing him to move faster initially and gain speed over time. While active, his Attack Speed is increased. This ability also stops the Wheel of Time.

Section I: Heal 1% Max Health Per Second
Section II: 100% Mana Refund On Abilities
Section III: +35% Magical Power
Section IV: +35% Magical Power Contribution to Basic Attacks

Ability Type: Buff
Movement Speed: 20% Initial + 12 / 14 / 16 / 18 / 20% over time
Attack Speed: 25 / 27.5 / 30 / 32.5 / 35%
Lifetime: 7s
Cost: 60 / 65 / 70 / 75 / 80
Cooldown: 14s

Shooting forward spinning gears of time, any enemies hit by Chronos' attack have their Attack Speed reduced and Ramp to a Stun, taking damage on the initial hit and again when they are stunned.

Ability Type: Line, Crowd Control, Damage
Damage (Applied Twice): 50 / 75 / 100 / 125 / 150 (+45% of your Magical Power)
Stun: 1s
Cost: 65 / 70 / 75 / 80 / 85
Cooldown: 16 / 15.5 / 15 / 14.5 / 14s

Chronos travels through time to where he was 8 seconds ago, gaining Health and Mana back to the values of that time. All of his Cooldowns are instantly reset as well.

Ability Type: Buff
Cost: 100
Cooldown: 100 / 95 / 90 / 85 / 80s