New deck: The Night's Watch Banner of the Sun

Hey guys, i'm new to the game and this is my first selfmade deck. For explanation: I only own 2 core sets and the first 4 packs of the first circle, so i have just 2 copies of many important cards.

I already ordered a third core set and i will change the deck a little. Now I would like to get some suggestions. I plan to kick Old Bear Mormont (Core) and the Practice Blade. Old Bear Mormont (Core) in my opinion is less effective than many other 7 gold characters. I manage to get no unopposed challenges but not losing any challenge is not that easy. And if the wall is not in play, and i lose a challenge he is just an expensive Bicon.

Instead i plan to put in a third copy of Benjen Stark, Steward at the Wall, Arianne Martell and The Wall.

I'm not sure about Samwell Tarly, Veteran Builder and The Iron Throne. I have rarely played them. What do you think about them in this deck?

As far as I played with my friends (we all just started to play) I won every 1v1 game (easily). But that doesn't mean that this deck is so good or me playing well, because my friends are unexperienced. I have played magic a long time ago but i still got the way of thinking strategic. I don't know how the deck will compete against decks of normal-experienced players.

I would be glad if you would leave some suggestions about my deck and cards i could swap in form the 3rd core set. Keep in mind that i just own the above mentioned packs.

Greetings Johnny

My gameplan is always to get out many characters, get the wall and defend it. I play many rangers for The Watcher on the Walls. I like playing Arianne Martell because of the 2 challenges you can defend with her and her action as well as Nymeria Sand who steals a symbol and defends.

My best combination in a play was a situation where i had Old Forest Hunter and Arianne Martell in play and my opponent had 3 chars with military, also played Sneak Attack that turn. I had no gold and 3 cards in hand. My opponent attacked with all 3 chars in a military challenge. I used Arianne Martell's ability to bring a ranger, used the ability of Old Forest Hunter to get 1 gold and then i played The Watcher on the Walls ^^. My opponent was very angry and conceded...