Leon build

Leon is absolutely one of the best brawlers in the current meta despite the nerfs he got. He has arguably best hypercharge in the game which has amazing synergy with his invisiheal star power allowing him to be more aggressive while not having to worry about dying. Hypercharge gives him speed and shield boost and with invisiheal he is very fast(hypercharge speed) and tanky(hypercharge shield+healing). His gadget gives him map control which helps him and his teammates to make game easier at the start. Lingering smoke(gear)gives his super longer duration which gives him more time to heal, and more time to sneak up your enemies(which is helpful against brawlers with big range since they usually try to be as far as they can). Damage gear gives him more damage on top of of his big damage. This allows him to create pressure even when he is on low health since enemies know Leon can caught them off guard with his high speed reload and unload attack. His best modes are Gem Grab, Knockout, Wipeout, Brawl Ball and he is good on Hot Zone as well but he has to look for his counters everywhere. He mainly gets countered by Spawners(if they manage to charge their super(Bear, Turret, Porters) since he does not have piercing/splash damage and it's hard for him to deal with them. Especially since those brawlers will charge another one very quickly. This disables Leon and his abilities to kill since Porters and Bear can also find enemies making him less Sneaky. He only can kill them if he caughts them off guard without them having super. If you face them while using Leon it's recommended to not target them and help your teammates that actually can damage Spawners(Like brawlers with splash damage) and you can usually switch lanes to fight Brawlers you actually can kill. He also can get countered by Artillery Brawlers early game because he does not have super and they can destroy his Lollipop gadget no matter where he puts it. Best way to deal with them is to manage to charge super. If you're do that then Artillery Brawlers will start checking bushes and start wasting ammo just to check on you. They also have no abilities to counter you up close so then you can just keep killing them with super while also recycling it. Snipers with push/knockback abilities like Piper and Brock mainly can limit Leons ability to charge super since he doesn't deal high damage far away. Best way is to slowly chip them and charge super. This is also one of rare situations where using his Smoke Trails(star power)is justified as it helps you get closer to snipers faster but even then Invisiheal is also good option. Assassin and Tanks also can counter Leon on certain situation. Crow, Edgar can be make Leon lots of trouble. Edgar can jump on him with super and kill him because he has high burst damage and heals as well. Crow can destroy Leons Super if he hits him once. He reduces his healing and reveals him while being invisible. He can also jump away if Leon ever gets too close with him. You should avoid Edgar and just damage him from safe range and also let your team deal with him. Crow can be dealt with Attack from far away. Like Bo, Leon can change his attack trajectory with how he moves. You can attack and move right to spread his attack for bushes and attack and go left to ensure all attacks hit opponent since they will go more linear making it easier to damage them. Tanks can counter Leon if you don't play carefully. Dont let them get close and you should be fine. Fang can make you some problems as he has range attacks and is good up close. This is also situation where if you are in ranked and you are facing mainly tanks you can use his Clone Projector and use it as shield or to find them. Leon is usable in:
Gem grab: Hard Rock Mine
Deathcap
Gemfort
Undermine
Acute Angle(in ranked and make sure to ban Angelo, Piper or any Sniper)
Last stop(On all these maps use lollipop drop but if they choose Artillery use Clone gadget because Lollipop drop is essentially easy to break)
Bounty: Hideout
Canal Grande
Color me Intrigued
Brawl Ball: Sneaky fields
Super Beach
Beach Ball
Sunny Soccer
Retina
Goalkeepers dream( make sure to ban melodie, angelo, or any sniper and Charlie if it's available)
Hot Zone-Not necessarily his best mode but can be used
Dueling Beetles
Parralel Plays
Open Business
Knockout- Arguably his best mode
Goldarm Gulch(Ban Rico, Ruffs or any Spawner)
Belle's Rock(Ban Artillery mainly)
Flaring Phoenix
Out in the Open
New Horizons
Between the Rivers
Four Levels
Wipeout: Infinite Doom
These are all maps Leon can be used (and where he is good). Use Invisiheal and for Gadget you should decide which one you should use depending on enemies team in ranked(on ladder I suggest Lollipop drop). Use super if you need to get out of dangerous situations(to escape), to assassinate, or even use it in creative ways. Possibilities with Leon are Limited to your own skill. Practice all match ups and when you get good with Leon you really won't have problem using him/pushing him since he is really good brawler.