Posts: 1,075
Threads: 14
Joined: Oct 2010
The key for Teemo in lane is to be extremely mobile, or to use your stealth passive with the combo of the brush to constantly ambush and then run away before they can respond. Teemo is extremely squishy, so if you just stand and fight you'll probably take too much damage, especially in a 2v1 lane, though going pretty far in defensive masteries and taking a doran's shield will help quite a bit. If you can get in a q + a poison auto attack you'll do a large amount of damage, especially if they can't respond. Taking boots first + pots also works really well with this style.
Teemo's shrooms also mean that you can prevent people from using the brush (or at least only at a large health cost), and prevent you from getting ganked. If you can place some shrooms where they won't be hit you can watch people come up to you from far away, and then shrooms close in where they will hit there's no way for them to get you with the slow on them + the w passive and active on you.
Teemo may not be the best choice in a ranked game, where all teams do everything possible to maximize their advantage, but in lower games, where people never ward, take team comps that people don't know how to deal with (such as all tank, or one with stealthed champs), and also where the laneing phase lasts much longer, Teemo works well.