Hearthpwn

Strategy:

Mulligan: Search for Frostbolt, Flamecannon or Nerubian Egg. Vaporize is good as well.

Early Game: Try to remove all his minios with your spells, your hero power and the Nerubian Egg. Save your minions for the late game.

Mid Game: Try to remove as many minions with spells and hero power as possible. If he plays Mogor the Ogre can be killed with the Big Game Hunter. You can start to play minions if you can "protect" them with Mirror Image or Haunted Creeper. However, sometimes it is necessary to play minios without protection to have at least something on the board when the Highlord has to much board control. If you have the possibility to duplicate a good minion than it can make sense to "sacrifice" a minion. It can also make sense to play Haunted Creeper, when you know that the spiders will survive until your next turn, so you can play a more valuable minion. Also reasonable is to play Sylvanas Windrunner when he has a single strong minion on the board.

Late Game: It is time to play minions and fill the board. If you have already some minions on the board you can play some more valuable minios. If not play some other minions and cards like Feugen [/card]or [card]Stalagg. Kel'Thuzad is a really good card to maintain board control. Archmage Antonidas supplies you with Fireball for further removals. Good to play him with Mirror Image. Dr. Boom is good on his own, since he comes with two friends ;)

If you figure put that you need AoE early in the game, than use an Explosive Sheep. It is also possible to substitute the Big Game Hunter with a second Vaporize.

Enjoy playing ;)

The following video shows the strategy quite good. And yes: I know i was lucky that game :P (In the end i am talking about the deck and i had 2x Mirror Entity in it. However, i figured out, that it is quite useless and replaced it)