This Teemo guide is what I have been using in 3v3. The main idea of this build is to get as much cool down reduction and ability power as you can. But, you must WARD WITH YOUR MUSHROOMS! While warding think; where do the enemys usually walk, how can I escape if I was ganked. You usally want to ward the enemys half of the middle jungle. In team fights you want to hit people with your dart and run, try and kite people into your mushrooms if your chased. Then when the enemy is at low health and retreating, pop ghosts and flash to pick up the kills. I usually top lane as Teemo with this build, but if its a hard solo, like Jax, Mundo, Olaf, etc., it doesn't hurt to 2v2. I have just destroyed in 3v3 with this build, and if you want to follow in my footsteps and be a carry, go right ahead and use my build.