If you go first, start with low mana taunts like Voidwalker or healing spells or minions. If you go second, keep Skull of the Man'ari and costly minions like Doomguard, Felguard, Voidlord, or Lakkari Felhound.
This deck has enough taunts and heals to keep you alive through rush and aggro decks, but has also enough minions to keep you in for late games. The Skull of the Man'ari is an extremely important piece, so be careful when playing it, although it is best to play it early. (Bloodreaver Gul'dan is the next important piece and the late game finisher. If you played both Doomguard, you can use (Bloodreaver Gul'dan to finish off an opponent with both Doomguard.
Use Sense Demons early in the game to pull Doomguard, which is the only double in this deck and it allows Reno Jackson to use his battlecry, which is crucial to staying alive against aggro and rush decks.
Use Curse of Rafaam to “lock up” your opponents mana crystals early on, by forcing them to spend 2 mana to get rid of the curse, or take an additional 2 damage.
This deck is strong against Aggro Hunter, Aggro Shaman, Control Priest, Control Mage, Mill Rogue, Kingsbane Rogue, and Spectral Cutlass Rogue.
This deck is weak against Jade Druid, Taunt Druid, Silver Hand Recruit Paladin, and Ragnaros OTK Priest.