I thought up an Ao Shin Kit
Why did I do this? I have no idea. IT CAME TO ME IN A DREAM!
So I guess I'll post it here for you schmucks.
Passive: Storm Scales While Ao Shin is in combat he begins gaining a shield for a percantage of his maximum health, increasing the longer he is in combat, up to a maximum of 50% of his maximum health. Any percantage of the shield that is damaged still counts towards this maximum, even if it has been stripped off. This ability has a 15 second cooldown before it can begin charging again, which starts after Ao Shin leaves combat.
Q Ability: Bolt from the Blue Ao Shin slowly gains up to 3 Bolts over time. When activated, Ao Shin can summon a bolt of lightning from the sky by consuming 1 charge. These bolts deal magic damage, and apply a charge of Bolt Touched. Targets that are bolt touched take very minor damage over time for 3 seconds. Additional hits of Bolt from the Blue will increase the duration and power of the DoT, but cannot do the original damage to the same targets twice. Bolt Touched can stack up to 5 times.
W Ability: Ride the Lightning Ao Shin commands the storms themselves to carry him, placing himself on a swirling storm cloud and increasing his movement speed significantly. Ao Shin automatically leaves the cloud if he attacks, uses an ability, or takes damage equal to or greater than 10% of his maximum health within 3 seconds. If Ao Shin remains on the storm cloud for 15 seconds, his next basic attack will launch the cloud at his target as a ranged attack, slowing them and applying 3 stacks of Bolt Touched. If he leaves the cloud for any other reason (using an ability, taking damage) then the cloud will explode in an AoE burst around him, applying 1 stack of Bolt Touched to all those struck, and dealing magic damage.
E Ability: Static Surge Ao Shin launches a straight line skillshot that deals AoE magic damage. If the target struck has Bolt Touched stacks, it immediately discharges them, dealing double the amount of DoT damage the stacks would have dealt instantly. Additionally, if the target had 3 or more stacks they are slowed significantly. If they had 5 stacks then they are stunned.
Ultimate: Storm King's Tempest Ao Shin gathers up a mighty storm in a large area around him, suppressing himself in the process, and becoming immune to CC. Enemies nearby are slowly drawn in and around Ao Shin in a circle. This does not interrupt them, and they can still move, use abilities, and attack. Enemies that get close enough to Ao Shin are struck by bolts of lightning every second, dealing magic damage, applying a stack of Bolt Touched, and granting Ao Shin additional shield from storm Scales equal to 5% of his maximum health per strike, and increasing the cap of Storm Scales to 100% of his maximum HP for the duration of the ability.
Thoughts Behind this
Ao Shin's role in the game is to be a powerful, tanky front liner that can apply potent damage over time, and if he stays in a fight long enough becomes both more durable, and capable of dealing large burst damage. He can use his ultimate in teamfights to pull enemies in, the pull is strong, so while dashes and extreme movement speed can help enemies escape, slower enemies will be inevitably drawn in, and make Ao Shin a potent team mate for setting up wombo combos, and keeping the enemies grouped up, while giving him the durability needed to live through the fact he's suppressed for the whole ability. He's strong with teams that like to roam and make team fights, using Ride the Lightning to move around the map quickly, make picks, and engage on foes. However he suffers heavily from poke and kite-heavy teams, who can land skillshots to knock him off of his W ability, wasting the cooldown and the CC it provides, and have the tools to escape, or disengage from Ao Shin if he tries to use his ultimate, as well as letting them poke from a distance to prevent his passive from kicking in during a full engagement. He has trouble dealing with heavy split pushers, and people who clear lanes well, as his own ability to clear lanes is hampered by his Q being unable to deal its instant damage to the same target twice, his E requiring stacks to do significant damage, and his W taking so long to ramp up. This means he's weak to being pushed in, and will have a hard time clearing waves of minions. In addition, while he provides potent grouping tools, and a solid front line, his actual CC is very limited, making it difficult for him to interrupt enemies, especially since his ultimate does not actually interrupt people. This can make him not just less useful, but an actual liability to his team in some cases. A poorly-timed ult can actually help the enemies, by pulling a Katarina or Galio directly into his own team when they ult, allowing the enemy team to easily take out his allies, then deal with him on their own time.
So there you have it, a random kit for Ao Shin. I didn't bother with numbers, because numbers are better left to people who actually know how math works. I am not one of said people. If anyone wants to make use of this, you have my free permission. If people want to think up numbers for stuff that would be awesome. If someone is good at art and wanted to make cool icons, that would be double-awesome, and I would totally add them in and credit you.