Thurindir meets some eagles while walking

The two decks are not really that well-suited to each other, but I designed them at the same time and have played through the Harad scenarios and (most of the) Kazad Dum scenarios with them performing admirably. Hirgon's deck does most of the fighting, while Thurindir's offers very solid questing, and some (limited) strength in combat. Some cross-play of attachments is helpful (Dagger of Westernesse being the most obvious) and both decks benefit from Gather Information and Send for Aid. With those two played, and Strider on Thurindir you should have at least 2 allies in play, Thurindir questing without exhausting for 6, and the key attachments in play on the Hirgon deck.