Mako, the Jaws of the Sea (revised)

So i posted a champion idea on here just a couple days ago for Mako. With that post i got a lot of good ideas and feedback so with all this taken in mind, here is the revised version of Mako, the Jaws of the Sea.

Passive-Rough Scales: Mako returns 2% of enemy auto-attack damage back to the source as physical damage

Q-Tidal Hunter: Mako charges to an enemy slowing them by 15/20/25/30/35% hitting all enemies in a small radius dealing 65/110/145/190/240 (+2% per attack damage) all enemies hit. If used on a marked target, the primary target is stunned for one second instead of slowed. Cooldown: 20/18/16/14/12 seconds. Range: 650

W-Rip: Mako uses his rows of teeth to ravage his target with his next auto attack, this bite also causes a slight bleed (2% of attack damage over time) and heals Mako for a 3/5/7/9/10% of the initial damage. Cooldown: 10/9/8/7/6 seconds. Range: melee

E-Jaws of Strife: passive: every fourth auto-attack marks the target enemy. Active: auto attacks become cleaving strikes damaging all enemies in front of Mako and slightly increases his auto-attack damage by 2/4/6/8/10% of attack damage. Cooldown: 15/13/11/9/7 seconds. Range: melee

R-Open Water: Mako submerges himself gaining a 30% movement speed increase for 3 seconds and can select an enemy champion and charge at them dealing 200/275/350 (+5% of attack damage) in physical damage and knocking up the selected champion. Also while charging, any enemy in the line of the charge is slowed by 20% and knocked aside. Mako is untargetable while submerged using Open Water. Cooldown: 120/90/60 seconds. Range: 800

Also when selected he could say: "Always show some teeth when you smile"

There it is! Please give feedback on what you think!