The concept of the Blood Queen was nice, but too exploitable. I used a kazakus priest for the fight, easy win.
Putricide was beaten by using a full secrets mage, a bit more tough than the previous one, I found it fun though.
I used a taunt warrior for Sindragosa, it was too easy, maybe easier than the first fight.
I look for the heroic versions of these fights, however I would like to see more unique cards from these bosses' decks...