I'm not new-new since I've played for a little bit and have a few of the expansions, but it looks like most people and blogs tend to build decks with Lore/Leadership and Spirit/Tactics. My wife and I have played and we've flipped that so I have a Lore/Tactics deck and she's got a Spirit/Leadership deck. Hers really is the main quest engine and mine does some buffing and handles most of the attacks (I'd say overall hers handles both a little better). Are we making it harder on ourselves by not playing synergistic spheres? Or does it not really matter because we've got everything covered between the two decks? Probably will make it harder to solo or go to play with other people if that's the case.
I'm also wondering if I'm going too heavy lore when I should be doing tactics. I'm running Legolas / Bilbo (card draw) / Denethor and while I'm very much enjoying the card draw from Bilbo, he feels a little useless other than that. I've got the hobbit expansions and the first couple of Shadows of Mirkwood packs so we don't have a huge card pool for player cards. I do run mostly lore cards though, but find myself never having enough money for most of my good tactics stuff.