Guide by and for use by eGx Happy
Thank you for visiting.

Playing with Teemo means that on every level you must outwit, outsmart, outplay, and out maneuver your opponents, while coordinating with your team is great when possible... Win the game for yourself. Utilize the aspects of the game which are written and standardized. Examples: farming, itemization and gold productivity, understanding game pacing (some smaller items earlier can snowball you faster than the larger money items, The faster the game is won, the faster you will reach the top of the cookie cabinet.
Know thy enemies, know thy self

UNDERSTANDING MINIONS AND WHEN TO PUSH / HOW TO LEAVE YOUR LANE WITHOUT LOSING YOUR TOWER TO MINIONS OR CANNON GOLD (basically, clearing the land for your mushroom farm^_^)
FIRST EXAMPLE:Pushing your cannon wave into tower creates this(your cannon is killed, their minions are slowed and bunched up clearing your minions away from the tower.

Once bunched and moving toward the line of your next wave of 6, the bunch will target the first melee minion of your wave thus killing it first. This creates the start of your large minion wave pushing toward your for you to CS off, while the enemy is losing CS. All of this can be done while out of lane. (ganking, farming Krugs or gromp, pushing another lane, backing, or setting mushrooms

To leave lane to gank, while enemies are not in your lane, leave the lane after doing this:

When you have 6 and they have 6, quickly kill 2.5 melee minions, and leave or then slow CS the rest with late late last hits, then leave lane. Should create a 6 vs 3.5 large push next to their tower, which then leads your cannon under tower, and eventually pushes back out to you with a large wave, cannon alive before their wave hits your tower

6 scaling ability power seals
1 flat armor seal
1 scaling armor seal
9 flat magic penetration marks
6 flat magic penetration glyphs
4 flat mana regeneration glyphs
1 flat magic penetration quintessence
2 flat movespeed quintessence

Stats should read

13.1 Ability Power/18
1 Armor
3 Armor/18
13 Magic Penetration
1.3 Mana Regeneration/5
3% Move speed

Normally 13 is an unlucky number, but it's teemo... unlucky is luck ^_^

12-18
5 - Socery (chose because it's easy to reach 2.5 attack speed)
1 - Fresh Blood (chose because it's best for ambush damage)
5 - Natural Talent (chose because we are talented and already have scaling ability power for it to supplement on top of)
1 - Battle trance (chose because it gives constant damage with no downsides scales your E damage off first hit, as well)

5 - Wanderer (chose because it's best for chasing the enemy down for the last hit)
1 - Assasin (chose because most of your battle will be you vs any)
4 - Merciless (chose because you need the damage to be high on low priority targets)
1 - Meditation (chose because added mana regen on top of runes to keep that bar full)
1 - Greenfather's Gift (chose because we grow weed, and need that extra ambush damage
5 - Intelligence (chose because I have 144+IQ and this is the only way I can have more mushrooms)
1 - Thunderlord's Decree (chose because it is the extra burst no one expects, the element of surprise)

-Doran's Ring + 2 Health Potions + Warding Trinket
(Every back fill up with at least 1 health potion)

-Boots Of Speed

-Hextech Protobelt-01
(Cheaper to complete than Liandry's Torment, and adds additional wave clear and battle maneuverability)

-Boots of Magic Penetration + Farsight Trinket (level 9)

-Wit's End
(Together Wit's End and Hextech Protobelt-01 are only putting you at 5k gold spent on the two as opposed to the 3100 gold of Liandry's Torment or another large item + 3200 gold Nashor's Tooth first is going to put you at around 6300 a Needlessly Large Rod sized purchase difference!!! Cheaper/faster item build into more expensive items later when you need them to scale.

-Nashor's Tooth
-Liandry's Torment
-Void Staff
(When dealing with high output champions that burst you 1 shot, you can switch out Void Staff for Abyssal Scepter or Zhoyna's Hourglass, when being pushed into your base, or having to clear many minions to get to their base, take Runnan's Hurricane, when you have trouble catching them go frozen mallet.

HEXTECH PROTOBELT-01 + WIT'S END + BOOTS OF MAGIC PENETRATION + NASHOR'S TOOTH + LIANDRYS'S TORMENT + VOID STAFF

Good Luck Have Fun