There is a tutorial video on f95 Zone which shows the fight. The trick is that at the end of the first fight against the zealots you need to keep one alive and play with it a bit until kelara had time to reload all your torpedoes then you just continue to the junkyard level
Level 3 weaponry and voron torpedoes should be enough. The only thing that is mandatory is six action points and preferably at least one cloaking point.
You could always enter into an agreement with the zealots and then you only would have to do one fight instead of two back-to-back.