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.
Threats to Heimerdinger with this build
|Xerath||He can be killed pretty easy, your stun grenade can cancel his Q & R|
Stealing Dragon & Baron
Stay Behing the Dragon/Baron's Wall and look at your W ultimate damage and use it on Dragon/Baron when it has hp low enough to kill it, ex: your ulti will deal 1200 damage, use ultimate when it has 1300-400 HP and you'll have a very big chance to steal it, also place a turret with you in case they have a blitz or grabbing champ so you won't get caugh after stealing it