The concealment kills are a slog. Any time your stealth meter is orange and people are looking for you, your sneak attack isn’t available. It’s best to go on a planet that has lots of little non hostile grubs, and sneak attack them. Otherwise you’re sitting in a base waiting to go full hidden and the enemies to stop searching for you. Good luck getting those kills took me several hours to get the appropriate kills.
I’m playing a goody goody character. Never been in jail more then a few times, and ive never exceeded 1k exp negative. I think it’s something with gamepass or just my game not being buggy. It is what it is.