The strategy of the deck is to reduce the opponent’s reserve to unfathomable depths while simultaneously raising high their discard pile and feeding your economy with the Iron Islands Markets, enduring the winter and eliminating their choices. The Winter Agenda is exactly what this deck needs and the plots exploit it to a major degree. Since the aim is to lower the reserve, you do not really care to reduce the opponent’s gold, thus the only 3 winter plots.
You start with Wraiths in their Midst, so the opponent usually gains the initiative. He usually chooses you as the first player (as most players do in the first round) so, ideally, you can exploit Alannys (she is x3 in this deck, because she is exactly what you need to attack the reserve) and put him in a very difficult position from early in the game. Even if he chooses to go first, chances are you mess with his strategy. Of course, Heads on Spikes is a natural follow and it continues the pressure. Then you can go on with either Winter Festival or Winds of Winter depending on what is on the board. Valar Morgulis can be used of course offensively as in most Greyjoy Decks.
The character curve is obviously low-cost oriented, (so you won’t get hit by your low-gold winter plots), but still impactful and able to maintain a good board presence. That is why Valar Dohaeris and Duel are here, so it is easier to clean the board from big characters. Having both plots in the plot deck can be really devastating for the opponent and their stats are far from abysmal. Many players, after being with Dohaeris, have a fall sense of security and play their big characters, only to get hit again in the next round! Aeron and Nagga’s Ribs are perfect together , the Blessing is a great protection, Asha and 2-claim make a great combination, Frostfangs add much to the pressure. Additionally, Tris Botley is great to counter Flea Bottom and 1x Fishwhiskers for the flavor (and another target for Aeron!). GJ Winter is something that you do not get to see often, so you can count on the surprise element to be on your side.