What I learned from all those Day of Judgement board wipes was to send my critters in waves. I now always leave a couple in my hand for the next wave. Here is my first wave. Notice Elspeth is already at 9.
I draw a ton with Slate of Ancestry.
Damnation board wipe.
Elspeth ultimate (notice emblem making all of my opponent's permanents indestructible).
Oblivion Ring to my Garruk, Primal Hunter.
Pacifism to my Wurmcoil Engine.
Here I continue to build my army.
And here is the winning avalanche. I had 15 cards in my deck and did not active my card draw to make sure I did not mill myself.