Twitch; A Gameplay Update
All ideas here will be a very small amount of changes and keep Twitch as someone super fun to play and keep his gameplay the same as this king hyper marksrat. Right now if you compare Twitch to the other hyper marksmen then there are no reasons to play him because his early to mid game is so weak unless he snowballs (outlier case) that his late game needs to be monstrously good to compensate, but he is either equal to or slightly weaker than the other hyper marksmen compared to their late game on top of him being weaker than them early to mid game. So my ideas will keep his gameplay the same (no reason to change it since it is not in a toxic spot overall) and focus on him being the king of the hyper marksmen; meaning a lot of late game buffs, but early to mid game nerfs, so that you are picking Twitch for a superior late game marksmen and teamfighter and give him a place there. I will still give Twitch effective tools to make it out of the early to mid game of course.
Basic Attack Range: 550 /575/600/625 (this makes him slightly less reliant on his ultimate's active late game, but not take away from his ultimate's power; ultimate will grant only 850 units skill shot basic attacks like it does now) Movement: 325 units per second
Deadly Venom (Passive): Ranks: @levels 1/5/9/13/17 Twitch's basic attacks each apply a stack of Deadly Venom to deal 2/3/4/5/6 true damage per second for 6 seconds and stacking up to 6 times.
Ambush (Q): Cooldown: 16 seconds; Cost: 30/35/40/45/50 Mana Twitch enters stealth after a 1.25 seconds delay which increases up to 7/5.75/4.5/3.25/2 seconds if Twitch takes damage, to stealth for up to 4/5/6/7/8 seconds and gain 10 plus 20% bonus movement speed while stealth. After emerging from stealth Twitch gains 30/40/50/60/70% bonus attack speed for 5 seconds.
Venom Cask (W): Cooldown: 13/12/11/10/9 seconds; Cost: 45/50/55/60/65 Mana; Range: 950 units Twitch hurls a cask of venom at the target location to slow struck enemies by 20/30/40/50/60% for 3 seconds and apply 2 stacks of Deadly Venom.
Enemies slowed by Venom Cask take 200/250/300/350/400% damage from Deadly Venom.
Contaminate (E): Cooldown: 18 seconds; Cost: 50/60/70/80/90 Mana; Range: 1400 units Passive: Twitch's basic attacks on-hit lower the cooldown of Contaminate by 1/1.5/2/2.5/3 seconds.
Active: Twitch deals 4/4.5/5/5.5/6% of enemies' maximum health as physical damage to enemies inflicted with Deadly Venom plus an additional 1/1.5/2/2.5/3%(+0.1% per 10 bonus AD)(+0.1% per 10AP) of enemies' missing health as physical damage per Deadly Venom stack the enemy has (max 400/500/600/700/800 damage against monsters).
For every enemy directly executed by Contaminate restores 25/30/35/40/45 Mana up to 50/60/70/80/90 Mana.
Rat-Ta-Tat-Tat (R): Cooldown: 120/100/80 seconds; Cost: 100 Mana; Range: 850 units Passive: Twitch permanently gains +25/50/75 units bonus range to his basic attacks.
Active: Twitch increases his basic attack range to 850 units and deals 6/7/8% of his targets' current health as bonus physical damage on-hit for the next 7 seconds (max 80 damage against monsters).
Twitch's basic attacks travel across their full range and skewer every enemy they pass through for the duration, dealing 20% less damage per enemy hit down to a minimum of 40% damage. These attacks apply on-hit effects to all affected enemies and can critically strike against each individual target.