The Paladin with the shiny armor mocks your Ice Barrier.
I believe he actually mocks any armor gain.
I'm usually at 2000 gold and 7000 dust before a new expansion, this time I am at 2000 gold and 3000 dust, but the Hall of Fame free dust will help me a lot. Also bought the Jumbo Bundle or whatever it is called.
Karazhan is the only Adventure that I can't recommend, the cards are weak, Barnes is the only one worth for now.