Okay.
Rianna will definitely be on the charge for the General. Galder and Con have also said they'd like to be on that. I think three of us is plenty for that. Rianna and Con both have mastered Coordination, so we can use Combination. Con and Galder would be able to easily clear out mook droids in our path, as well. And Rianna's got Riposte, so yay for free attacks.
Rand and Azarl would be my choices for getting up high to dump rocks on droids. They both have good-to-high dexterity to get up there, and both have Bombard.
Xavier, Dak, Gallador, and Tanic can go crazy-nuts on droids. Just kill everything.
Relle could basically do whatever she wants, but if she could also climb up high, she can use her gun to snipe at droids. If she doesn't go climbing, she should be with Dak and that group, bringing down mooks.
Those who do go climbing can always hop back down and join in the fray with lightsabers when they get bored with what they're doing, of course. But since this is the last fight, there's no need to be thrifty with Force points, so Rand and Azarl should at least stay up there until they're out of Force points, or only have one left (in case it's needed for a defense or something).