Hi!
I play against him very often (3-4 days every week), so I can answer something.
This deck controls the board quite well, but even that, he thought he would need a "minireset" and so he changed Rule by Decree foro Wildfire Assault. Now he said that Wilfire was not so good, and he comes back to Rule by...
Siege of Riverrun is better than Song of Winter because of its initiative. He always want to attack, so he can clear the board as much as he can, and it´s a Military Battle, so that turn he can also kill something... (mi Castellan, normally...¬¬)
And yes. He prepares to Valar, keeping (or trying to do it) a Northern, Cavalry or Infantry, and some other cheap character if he sees the board is controlled (and so, the opponent thinks about a reset.), the same for the Silent Sisters, that he almost always leave in the shadows until the Valar is played.
Bound by duty is a consequence of playing against me, I´m affraid...xD
If you have any question, tell me and I will move it to him... Google seems to works well