wait, why get rid of ugluk? hes the MAN! i mean, just for the roaming penalty ability, hes super useful at sites 2,3, and 4. he IS an uruk tracker, so if you play one other tracker he's an easy strength +3, drop one more tracker on the table if you have the twilight, and you've got a frierce, damage +1 strength 12 tracker, that can take advantage of
vengeance and all those search cards.
i also think grima is counter productive to the tracker strategy, if you are going to take out a minion, make it be mauhir,
patrol leader, because you have the swords to replace his ability. and again i'd sugest a copy of
many riddles.