I am a very new player. I just got the core set about 3 or 4 days ago. I plan on playing this game with my regular group of friends that I play board games and the like with. However, that group usually contains 5-6 people so I am looking to buy the Greyjoy and Martell expansions so that we can have 6 people playing at once.
How would you recommend building Greyjoy and Martell decks that are about equal to the starter decks? I don't want them to be terribly overpowered or underpowered so any advice would be appreciated.