A Mighty Kuang (Ao Kuang 10.3 Jungle, Solo, Support[?])

In late S9, Kuang was buffed a few times, so your early isnt as bad as t used to be, but it's still not your forte... you are nearly never going to get an early kill in mid unless the opponent plays extremely out of position. Clear the first mid wave and grab your 2nd spd. Prioritize farm and get to 5. You can solo mid camps if you're healthy, but ideally mid throws an ability on them.

Once you near 5, immediately look for an enemy below half health and take note of who does and does not have beads/aegis. I find it is often pretty easy to get a pick on the enemy support if they aren't warding well. Supports never grab beads first, and your priority is getting the execute more than the specific target thanks to the movement and heal provided by a successful ult. If you do ult a target with beads/aegis, be prepared to keep chasing (on this note, it's easy to blink/1 a target under tower if they do not have the spooky relics, as your ult can provide you an easy escape, but Do Not try to ult someone under tower if you aren't sure they're relic is down). It's well worth trading your ult for a beads if you can do so safely. Often you can still get the kill, especially if your 2/3 are coming off cooldown. You most often want to be looking for ganks and targeting lower health targets, but if you're healthy and on par level-wise, you can 1v1 most gods once you have at least 2 items. You have solid pve damage and should be able to do scorpions alone and objectives with a little help.

If someone is isolated and doesn't have beads/aegis, you should be able to solo them pretty confidently. That being said, patience is key in teamfights. Try to blink in if possible and save your 1 to escape. Your aim is to burn down a single target quickly and ult them.

Note: people often don't expect Kuang solo and depending on your team, will often build the wrong defense item. You can use this to your advantage, especially if you don't box them for the first couple of waves. A full 2 can seriously threaten an opponent without defense.
In most scenarios you will be playing passively for a while. Try to pve over pvp as much as possible. Take note of your lane opponent's relic if they don't have a defensive relic and aren't building magical defense, try to poke them (proc Warrior's Axe as often as possible). You can follow up on ganks, but you honestly shouldn't be getting kills. You are squishy and may very well be a target for the enemy jungle.

If you are trading decently into your opponent, try to get them into ult range and either burn relic or get a kill. If mid's relic is down you can also look for an early gank there. Generally you want to apply pressure by using your ult near cooldown. If the enemy is trading well into you, you can delay leveling your ult and focus on clear as you will probably be using your ult defensively to by yourself time or on ganks.

Once you are full build, you should be pretty difficult to kill and your ult gives you great trade potential and some nice safety if successful. Unlike in jungle, you can initiate some teamfights, but you still want to save your 1 to chase down kills or escape if possible. If you aren't the primary engagement, you can worry a little less about beads being down as using your ult for safety will be less of a priority.

As noted in the intro, this isn't good, but it lets you carry and consistently 'secure' kills while building some auras/defensive relics and defense.

Yu dont have great AoE, do green+harpies -> purple most games. Play to clear and use the slow on your 2 to alleviate pressure. You don't have CC outside of it, so use it and your relic wisely. Getting an early lead is great if you can get it, especially against enemies with CC immune ults.

If you built cloak, prioritize stacking it by poking. Its a huge power spike to complete. As with jungle you pretty much want to use ult on cooldown. You either burn actives or get kills- good for you either way. However, you probably aren't getting kills on failed ults; leave that to your team and move to the next target/"peel". You should trade pretty well into the enemy support- feel free to ult them!

You are more often going to be starting fights than peeling since your cc is so limited, so be very aware of your team. You need some follow-up before your ult will become relevant. If your team is failing to follow-up, you can focus your damage on anyone who might dive. Whether you are chasing or peeling, you should be firing your 2 for the slow often. Remember that you are in fact the primary tank and should be tanking objectives. Ward and start them.

Once full build you can often chase enemies for a while, but don't let that distract you from your role as a tank. You can actually ult people under towers who may have beads/aegis at the ready. When tanking towers, be sure to use your Animosity autos on them unless there is someone already in execute range.