Sumetzi, Shen's long lost brother A Ninja marksman?!

I love playing various champs on league of legends but every once in a while I get on the ninja binge... Furthermore I got this dream... a dream that one day it will be possible to run a ninja team comp at least for fun teambuilder games and troll games I mean cmon everyones seen the yordle comp.. of course we usually don't realize it until we're down to our last tower and trist is fed to hell... so ive been playing with this idea for a Ninja marksman for a while now but didn't sit down and try to put it togeather until recently, and yes im aware that kennen is a marksman secondary but he's never truly been a full blown adc.. so heres the kit that I came up tell what you think...

Sumetzi, a medium ranged ninja marksman assassin high difficulty high attack damage

passive -ninjutsu: basic attacks and abilities apply stacks of poison on targets, dealing 1% targets max health as magic damage over 5 seconds stacking up to 5 times; upon reaching 5 stacks of poison on a single target, the target will become slowed and receive reduced healing for the duration of the poison.

Q : Poison Shot: A medium ranged skill shot, applies 1 stack of poison on the first target hit in a straight line Poison Shot (ninjutsu passive bonus) if target has max stacks of poison applied poison shot will deal addition damage based on targets missing health

W : Vanish : Sumetzi drops ninja smoke bombs that covers a small radius where he's standing, go's invisible and gains a small movement speed bonus for 1 second. players inside the smoke radius lose line of site of their surroundings ( Ninjutsu passive bonus) targets with max stacks of poison inside the smoke radius are blinded for 1 second

E : Dancing Blades: Sumetzi dashes a short distance slashing enemies within melee distance with his sword applying a stack of poison, activate again within a short timeframe to throw a kunai skill shot damaging the first enemy hit and applying a stack of poison ( Ninjutsu passive bonus ) targets with max stacks of poison hit by either attack from dancing blades will be stunned briefly

R : The Art of Warfare: Restores Sumetzi's energy to full and resets the cool downs on his other abilitys gaining small damage boost for the duration ( Ninjutsu passive bonus) : other ninja's basic attacks apply stacks of poison within a large radius of Sumetzi

well that's it, I don't think its to dam op because its sorta like talon if you blow all your cooldowns on one person your left wide open for everyone else

So let me know what you think questions comments and concerns