If you mass trans to your hideout I doubt you'll have that much resistance. But it's also a long way back to the sewers from the hideout. The formation I used was to have two people of your party use guns and one person use two swords. So then the person with the two swords draws the majority of the fire while the people with the guns blast the hell out of them.
I'm actually training to become a Jedi now. But I'm going to be gone for a few days so you'll probably get ahead of me.