i agree. it needs more focus. if you want it diverse, then the most you can do is try to run a hybrid with the corsairs and the troll. both orbit around possessions, so that is the common thread. get grima and all isenguard cards OUT of this deck they will kill you.
hides really should get the heck out also, it adds nothing except a possession, and a few
ships of great draught would do the same and also make sure you can drop those castamirs back on the draw deck for the late game.
i would also drop
shotgun enquea (your big minions should be crowd control enough), sauron (your trolls and
castamir are heavy hitting enough), 1x
castamir (he's unique and you can put him back on your deck with
ships of great draught). that should free up 10 slots to fill with little scrappy sauron orcs and the like.