Starks, Tullys, Arryns, Lannisters, Baratheons, Tyrells, Greyjoys, Wildlings, and the Watch can use BI's barb peasants. Spear militia would also be the barb version from BI, except for Martell. Halberdiers and Axemen for Baratheon can be any not-so-fancy versions from WHTW.