Hi, I'm running the game with my group of friends and we've got all the deluxe expansion packs except for the Lannister one of course. Problem is, the kids wont shut up about wanting to play Lannister and Greyjoy. So I'm asking you guys what chapter packs I should buy to make a Lannister and Greyjoy decks that's balanced enough to take on a stark player with 2x core set and Lords of Winter, a targ player with 2x core set and PoD, and a baratheon 2x core+ KotS.

For Lannister all I have is 2x core set, and for Greyjoy just Kings of the Sea.

Greyjoy should be easy enough with the cards you currently have; a deck themed around "Power of Faith" and Greyjoy's plentiful Holy Icons, similar to the Will Lentz deck (http://www.agotcards.org/deck/v/1577) should be quite feasible with the cards you already have.

Lannister is a bit trickier - your best bet is probably to wait until November for the reprinted King's Landing set (lots of shadow stuff that plays well with Lannister) as well as pick up the Lions of the Rock set then. In the meantime, you could go for a Brotherhood or Clansmen (Same chapter pack) deck with the easily-accessible "Brotherhood without Banners" set of chapter packs.

did you get the original Kings of the Sea with the house card and 1 copy of each card? or the revised edition with 3 copies of each card? if the later, i'd suggest snagging the revised for the full playsets of greyjoy cards.

I also made a fairly balanced greyjoy deck using the brotherhood without banners agenda (really helps with their income and influence generation).

i personally am waiting for the Lannister expansion...