The strategy is pretty simple. Play units with warcry and attack to make even stronger units with warcry. We also have a couple flyers that double as support to scout, buff our units, and access the market.
Use Tarra to buff a smaller unit with warcry and feed it to the enemy (they will block and kill it, rather than let it pass through) so you get a stronger Tarra. Look for opportunities to play Sanity Scorcher and buff it with either Steyer's Eyes or Helena Skyguide to finish off the enemy in one big hit.
Why do we include Breach The Defenses when we already have Torch? It's optional but the AI likes to play Permafrost, a lot, and this card gives some flexibility to either deal direct damage or attack with a unit when the AI doesn't expect it.