Between Lady Hothie and I, all of the minis listed are in our possession...sick, I know...
And we'll have roughly 4-5 hours to play it all out. With the scrubs all being 10hp, I think they go down quickly, so I don't think time will be an issue. And there are enough characters with flight that neither side can line up along their shield Braveheart-style and hide, hoping to wait for the others to come to their rescue.
My analysis, the Republic is out-manned, but they have the higher hp, damage, and attack values. The arena pit will be their big Custards last Stand battle. The beasts don't count for either side, yet will attack the jedi at first. The seps in the arena mostly are melee, so I've chosen non-unique jedi with sweep.
And on the plains, if you run your character to take down the opponent's shield right away, now his entire army is attacking whoever is not behind your shield. I think it will be fun.
Sev and the Homing Spider droid are the only accurate shooters, but the spider does 30 damage, so Sev has to be very careful. If I'm republic, I take out the overseers as quickly as possible, then maybe the BDO's and the SBDC.