Figuring out the end-game for Star Wars Outlaws

Possible game spoilers below, if you're sensitive to that. In the last few weeks I started the final missions for Star Wars Outlaws; the whole game is leading up to putting together a big heist of a vault ("The Heist"), and in one of the cut scenes right before starting the heist there's a kind of Ocean's 11 planning scene, which is kind of cool. I digress. Anyway I'm in the actual heist phase, having just stolen the Giant Sum of Credits1 you have to escape through the Canto Bight casino. I'm stuck here a little bit because you have to bring down a series of energy barriers. You start with one, and then you get to 2, and then 3; that's how far I've gotten until I get gunned down by thugs. I decided to stop playing last night but have been thinking about the best way to approach this. As soon as you bring down one energy barrier, the bad guys start rushing through to start shooting. The first energy barrier is easy enough. But once you get to multiple barriers, they rush in before you…