Pantheon can duel almost every Jungler in the game. A good Pantheon will constantly look to invade the enemy and get kills.
Pantheon’s level 6 allows him to gank his allies from afar. He can cast his Ultimate R from afar, which means he’ll avoid and dodge shallow wards.
His W offers him tons of pick pressure throughout the game. Getting the right pick on someone can easily win you the game or the team fight.
In team fights, and when ganking, Pantheon is easily kitable. It may be really hard for him to get on to an enemy if they have a lot of dodging or dashing tools too, even with his point and click CC on his W.
If Pantheon doesn’t get ahead, he will be really hard to play in the later parts of the game. He will be pretty much useless outside of his W and E.
Unlike many Junglers, Pantheon cannot use his Ultimate R in a 1v1 setting. He can not use his Ultimate R in skirmishes or in team fights either (albeit he can start a skirmish with his R).
0 - 15 min
Your early game will be a bit hard till you hit level 3. You should be able to gank enemies freely once you unlock your W and E and instigate tower dives on low-health enemies.
Always look to gank overextended enemies when possible. Your kit will let you CC the enemy to oblivion and will allow you to burst them down just as quickly.
Unlocking your Ultimate R will make it relatively easy for you to gank your enemies. Notify your teammates beforehand as your Ultimate R can go unnoticed by them, especially in lower elos.
15 - 25 min
The mid-game should be easy for you, and you will be ganking enemies quite frequently. Just make sure you rely on picks and kill off squishy targets when possible.
Your presence will be massive during skirmishes, but you will need to use your E carefully. You can even try to Flash > W enemies who are high priority and need to be taken out quickly.
You will want to help your Support and work with them to ensure that you can capitalize on your lead. This is important towards ending the game quickly.
See if you can secure picks during this phase of the game when possible. You will begin to fall off, so you must avoid 5 v 5 team fights when possible.
Keep track of the enemy Jungler and stay near-neutral objectives as much as possible. You don't want to get spotted on the other side of the map and lose a crucial objective out of nowhere.
The fog of war is your friend, and you will want to use it to flank the enemy when possible. The goal is to get rid of the enemy carries as quickly as you can. You may also opt for a tanky build and act as a frontline if need be.
His early game ganks are really strong as he has a lot of CC and damage reduction in his kit. He can quite quickly instigate tower dives on low-health enemies.
Level six is a massive spike due to him being able to get his Ultimate R. This will let him make plays around the map and get his team ahead.
The first component will let him deal more damage and spam his abilities due to the increased mana.
Level 11 is not a massive spike like other Junglers. It gives only a minor increase in the damage and no utility, unlike other Junglers. That being said, the lower cooldown certainly helps.
His first ability will be maxed out at level 9. This means he can deal a massive amount of burst damage to any enemy he gets too close to.
Pantheon is quite potent during the mid-game. This is because he can dish out a lot of damage in a short time and can secure picks all around the map.
Level 16 isn't that great a spike as it will only increase the damage of the ability and reduce the cooldown. It won't provide any utility whatsoever.
He will fall off later during the game due to the enemy purchasing defensive items. He should still rely on picks to get kills all around the map.
Most of his abilities will be maxed out during this phase of the game. He can look for picks all around the map and can set up death brushes in the Jungle.