Nice blitz Vikings deck (with a nice touch of flank)! My suggestion (if I may) would be that, maybe adding cards that allow you to draw more could make the deck even faster but I haven't seen game changers in that department yet, although I'm far from having seen all the cards. Combined with any other thing like that which adds to the speed of the deck (if it's possible) such as low cost cards. Just a thought, maybe I have it all wrong, you are the one who has experienced the mechanic of this specific deck...

I play a frontline Atlanteans deck, I too usually use a 1 mana god power where I reduce one of my adversary's creatures by -2 strenght.