Hearthpwn

I guess I'll steal your idea to play inspire minions. I'm not sure about Recruiter, it looks way too slow. But Nexus-Champion Saraad looks awesome, cuz it's 7-mana cost with inspire activation, thus can be cast same turn 3-mana draw was casted (I'm talking about Coldlight Oracle and Grove Tender), and can be played after Azure Drake just to produce tempo and threats.

Kvaldir Raider, Savage Combatant looks okay too, but I'm not sure I'll find a spot for them.

Yeah, you are absolutely right about manacosts. Now that I think about it, it comes clear that 9-mana cost is bad. I've removed everything but Tree of Life from that slot (because it's my answer to face decks).

When I though about possible combinations of cycles and big cards, I've come to conclusion Novice Engineer is the card I wish to see in the deck, not Coldlight Oracle. It allows to play 8-mana minions and don't give opponent cards.
And when I think about Azure Drake, i see better spot with Gnomish Inventor, because it allows to play 6-mana creatures and Savage Combatant the same turn.

Dr. Boom is something I don't want in my deck because of BGH. 7-slot is already huge with Nexus-Champion Saraad and druid 7-drops.

I think I'll take your idea to put Foe Reaper 4000 instead of Kel'Thuzad, because it's bigger threat on it's own.