I wanted to say that our tournament rule is that u can have up to 50 models xD, and once i participated i had 44 models in mordor army, it passed very well (I was on 4. place from 28. xD)...
And my good army 37 models (Elves), all some good strong units but they get overrunned by goblins (50 models) and 2 times crushed by uruks (47-45 models) :S

Btw both armys were borrowed from my friend.

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There are fouler things than Orcs in the deep places of the world...

So you could take mouth's army, whittle it down replacing some warriors with Dunedain, or ally with Gondor for horses, and still easily hit 50.

I didn't know that i can ally this army with gondor horses!
Damn i need LOME!!

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There are fouler things than Orcs in the deep places of the world...

I'm with Mos's army but as he has too many troops, I would drop Ardevui and a mix of WoA and rangers to get Saruman the White as he has equal stand-fast and higher courage and to finally knock the numbers down to around 50, I would get another banner for the WoA.

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"War does not determine who is right, only who is left."
- Bertrand Russel

They can´t ally with the Wizards...

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I am the Mouth of Sauron, here him speak'