Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Ok, so I don't really know who read this **** since you just need to look at the items, runes, masteries and the skill sequence to have a fairly sweet Teemo / LeBlanc / Dr.Mundo, but I have to write a 300 character build description to get a ''complete'' build.
Ofc. this is just my opinion of how the builds should look like. So you can ofc. think a little bit outside the box if you want to.
Teemo: So for Teemo I'm starting with Blinding Dart for harrasing, that's also why I choose to buy boots from start (you also get money over to buy 3 health pots). Then I buy Meki Pendant (mana reg.) since your mana disappears kind of fast when you are harrasing. Late game I just keep buying attack speed...