Singed Rework Concept
So I was thinking about what Singed would look like reworked and this happened. Tell me what you think!
Passive - Poison Trail
Singed lays a poisonous trail behind him that deals 10/30/50/70/90 (+20% Ability Power) (Levels 1/5/9/13/18) magic damage per second for 2 seconds.
Rylai’s Crystal Scepter does not apply to his passive.
Q - Corrosive Flask
Singed throws a flask at a target location, applying a corrosive potion to all enemies struck that deals 65/120/185/225/260 (+60% Ability Power) magic damage. If the flask strikes an enemy champion it explodes in a greater range and applies a Mark of the Chemist for 5 seconds to all champions struck.
Cooldown: 14/12/10/8/6 Mana Cost: 40/60/80/100/120 Cast Range: 1000 Radius: 75 Champ Explosion Radius: 250
W - Frozen Trail
Passive: Increases Singed's Ability Power by 10 for every 100 Bonus Health he has.
Active: Singed changes his brew by adding a freezing mixture for 5 seconds. Singed poison applies a debuff that slows enemies for 30% for 3 seconds, and then stuns them for 1 second.
Cooldown: 20 Mana Cost: 40/30/20/10/0
E - Fling
Singed flings an enemy over his shoulder, dealing 50/80/110/140/170 (+2/4/6/8/10% of Singed's Bonus Health) as magic damage. If the target Singed flings has a Mark of the Chemist, they are also rooted for 1/1.25/1.5/1.75/2 seconds.
Cooldown: 12/11/10/9/8 Mana Cost: 80/90/100/110/120 Cast Range: 175
R - Insanity Potion
Singed drinks a potent brew of chemicals, granting him double speed, double damage from his passive, and a 40% slow on his passive for 8 seconds. Upon activation a global laugh is heard.
Cooldown: 140/120/100 Mana Cost: 100
How about a Drink? -- 
Edit 1: Added W rankings and added global laugh to ult.