Pioneer + Pokpok is still one of the best turn two plays in the game, and since the expedition archives update it's available in expedition.
Blurreechaser is a decent early unit. His scouting gives more consistency to our half units/half spells deck and his quickdraw means he loves the warchief buffs.
We have a good amount of spells to clear the way so our yetis can attack safely, which gives us more spells from snowslinger and more power from pioneer.
We really value the snowballs we generate, so try to bond Pokpok every time. With a crone, a smuggler or an Iceberg warchief on the board, they (and our other spells) turn into efficient removal options.
Iceberg warchief is an underappreciated card. He can immediately turn our board of yetis into bigger threats, and if he stays alive, he turns our spells in hand into bigger threats too.
Sodi is great because we want to be attacking anyway and if we can't do that we can always throw a snowball at their face to draw a card with her.
Our market has an answer to a big unit, an answer to a bunch of small units, a garden as another good site, a greed's reward to draw some cards and a prodigious sorcery to kill the opponent.
Weaknesses: Most of the games I lost were to either sodi's spellshaper (what deck doesn't lose to this card though?) or vara's favor.