His Passive can be really obnoxious to deal with, especially when he is hiding in a brush and moving in and out while pelting his laner with his Q and E.
He is the bane of ADC mains as his Q quite literally makes them miss their auto-attacks. This can reduce the effectiveness of the carry for a while, which gives his team some time to engage/disengage freely.
The Ultimate R can act as a substitution for vision, as well as deal a lot of damage when kept in the right spots. This is especially useful when it comes to avoiding ganks.
Very squishy and layered crowd control can get rid of him immediately. He is vulnerable when his Q is down, and can be engaged upon if his W movement speed is reduced.
His Ultimate R can easily be gotten rid of by the enemy by purchasing Control Wards. Enemy Junglers with leaps and dashes can also bypass these mushrooms by taking odd routes.
He falls off quite drastically during the late game and can only resort to split pushing. This puts his team in a disadvantageous state and causes a lot of tension to build up within the team.
0 - 15 min
Use the lane brushes to get an edge on the enemy laners. You can easily poke them with your Q and auto-attacks as you will be hidden.
If the enemy laner roams, don’t bother trying to contest their roam. Instead, push the minion wave and start earning turret plate gold.
You will want to riddle the lane brushes with your Ultimate R and use them as cover to keep chunking your opposition out. It should be pretty easy to do during the early game.
15 - 25 min
Although you are a Support, you can easily decide to take matters into your own hand if you have a good enough lead. Do not do anything rash though, else you will easily be the reason why your team loses.
The map should be filled with your Ultimate R traps. They not only do damage but also give vision of an area until it explodes or disappears.
During team fights, make sure that you stick with your backline at all times. Playing too far forward will easily get you killed.
Use your Q to prevent the enemy ADC from doing anything in this game. Always focus on the champion that is close to your carry for maximal effectiveness.
Try to lure enemies into fighting near your Ultimate R infested areas. It will allow you to auto-win a major fight due to the amount of damage your Ultimate R traps do.
Ensure that your Ultimate R traps are in the choke points during neutral objective fights. This will make it really hard for the enemy team to do anything in the fight.
At level 6, Teemo can place tons of mushrooms R around the lane. This can help him prevent ganks from the enemy Jungler, and make it harder for the enemy bot lane from playing aggressive.
Teemo is strong early and can bully the enemy down a ton. However, it depends heavily on the matchup and he must always position carefully so he doesn’t take unnecessary damage.
When he has completed his first component item, Teemo’s poke and damage output in the lane will be a lot higher.
He can roam around the map and place his Ultimate R mushrooms in heavy traffic areas. It will allow him to detect enemies as well as get kills on unsuspecting low health targets.
His first ability will be maxed out at level 9. This will let him deal hefty amounts of burst damage and will let him kill his enemies quickly.
He isn't outstanding in team fights, so he should either resort to securing picks and blowing people up with his abilities or just split pushing till the enemy responds to him.
Level sixteen will further reduce the cooldown of his Ultimate R and increase the damage of his mushrooms. Enemies will have a hard time traversing choke points now.
He will have a lot of ability Haste now, which means he can drop a lot more mushrooms around the map. The enemies will have to invest heavily in vision to keep themselves safe.
He will complete his build during this phase of the game, which will allow him to one-shot squishy targets. His Q blind should come in handy during this phase of the game as well.