Not Updated For Current Season
Well guys, this is my first build, but, when i use Teemo i always choose these items.
The first thing to buy is dorans blade, because of the hp boost, the lifesteal and the dmg. You should also buyy the health potion just in case your oponents are very good players.
With this, you are alowed to keep on lane until you have at least 1k gold, and if you are smart gettin first blood is easy.
When you get your boots and Vampiric Scepter you can start rockin. Even though your life is gonna be really squishy, your Lifesteal will take care of it.
Complete your Malady and go for BF blade, thats probably gonna be mid game already so gank as much as you can to get money for it. With BF, you can get enemies alone and your criticals will be doing great dmg. When you get after BF, if you aren't gettin right straight to Infinity Edge, buy the cloak, so your dmg is gonna be even greater with the crits and you'll get more kills. Get your Infinity Edge and run for another BF to get your Black Cleaver. At this point, your AS is gonna be around 1.6 and your crits will be hittin around 500, since you're doing many crits thats a lot.
I almost never get to phantom dancer or bloodthrister (to get it you obviously have to sell dorans blade), but they r great items for teemo too.
About the sumoner spells... I think Heal is a great spell, since teemo is so squishy so it should allow you to help your partners and yourself.
Exhaust is just great, since the only slow you have come from the mushrooms, you can use it to get easy kills on anyone.
The monster buffs work greatly on teemo, but, since everyone runs away from your dmg, Red Buff is the greater, again, because of the slow.
Max your poison, because, your enemies will think less dmg than they really are at early game and when they look at it, your poison will have killed them.
Blinding dart is a great skill, because allows you to fight most of mellee champs without losing more than 200 hp.
Always put a point on your mushroom and remember to keep one in baron to see if your enemies are trying to do it.
Movement speed is good... But not necessary. Max it at later game.
PS.: never skip from a fight. Your Lifesteal + your dmg and AS can keep you alive longer than you think.