Shadow side seems a bit scattered, especially with the lone troll in a swarming deck. I especially think that you should take out the troll chain which seems unnecessary and unlikely to be useful if you only have 1 troll in the whole deck anyway.
Also, the Uruk-hai are alright, but there are going to be better guys for the same cost that you can put in. For example, I really can't think of a reason to use
Cirith Ungol Patroller over
Orc Swordsman - so what the uruk is damage +1, he's the same cost and
Orc Swordsman has +1 strength with the potential for even more. If you're trying to swarm, why not consider some of those
orcs which are designed for the purpose by helping you draw cards (like
Orc Insurgent)?
Other than that, I'd replace the uruk-hai with better Orcs, but otherwise looks decent.
Thranduil