If you metagame and craft/upgrade some Mandalorian blasters (or similar) for Mira and lightsabers for Visas beforehand, it's pretty easy to tear through those mobs. T-3 also has an easy time.
Atton completely sucks before he becomes a Jedi, though. Beating those Twi'lek assassin vixens is nearly impossible. Yet later he easily beats Darth Sion (although for drama's sake it's better to let him lose).