This is the deck I used to beat Heroic Razorgore. The key to this fight is controlling the eggs. Wild Pyromancer + Equality is your board reset and is cheap at just 4 mana. If you have built your board and want to preserve your minions, try Equality + Consecration.
Before you have the mana for those combos, you need deal with the eggs in the early game. That's where Crazed Alchemist and Ironbeak Owl come in. In case of emergency you can let an egg hatch if you have Big Game Hunter or Humility in hand to deal with the 7/7 that comes out, but it's ideal to save these cards for his other big creatures.
Kel'Thuzad is almost a guaranteed win with the board control he provides.
Beware of Bloodlust! Keep that board clear.
Hope this steers you in the right direction! Leave a thumbs up if you find this helpful, thanks.
P.S. Make sure to check out my deck for Heroic Vaelastrasz: http://www.hearthpwn.com/decks/235168-brm-heroic-vaelastrasz-zoo-priest
Additional bosses to come.