Argonians also got a variety of sub-species.
There's some of them as tall as the giants of Skyrim.
There's also the winged variety.
But then again, they're all tribes.
The Argonians are probably only powerful near the Hist trees.
I know, I mentioned that.
But the battle-cats are like the Oliphants from LotR: Unless you have Legolas on your side, they're gonna tear you up. And since the Bosmer are too short, and the Altmer wouldn't be caught dead climbing anything in their NEW robes, the battle-cats will do some damage.
Not to mention, it sounds like Thunder Cats.
Mai'q: BATTLE!
Mai'q: BATTLE!
Maiq: BATTLE-CATS! HOOOOOO!!!!!
Edit: @Darky0: The orcs would get ripped apart. They're too scattered to unite and fight properly, despite being very strong individual fighters.
Maybe if they weren't scattered strongholds and were one united force they could do a lot of damage, but they're population is too low for any real domination.