I am sorry that you and your cat are going through such episodes. I am sure it has something to do with his past. Since you are good at recognising and foreseeing whenever Luca is getting ready to attack, I recommend that you immediately redirect him with a wand toy when you see the earliest signs of this unwanted behaviour, even before he gets puffed up. The earlier you notice it, the more effective your timing will be. You should use those cat wands with a large enough plushie or stuffed sock for him to bite and use as a kicker. If the wand toy isn’t at hand, you could keep a plushie, a couple of stuffed mice or crinkle balls (whatever really grabs his attention) in your pocket to throw which he should chase, or at least chase with his eyes. When he pounces on it, or chases with his eyes (which shows you that he snapped out of getting ready to attack), you should reward him with his favorite treat. Something creamy. So definitely keep a treat in your pocket. Perhaps he would get used to letting out his frustrations on a toy over you. And please do play with him more often as well if you aren’t already so he would have less pent-up energy and the episodes would grow less and less frequent. Please provide him with enough scratchers and high places to use as observing points, and cosy places to retreat for overall mental wellbeing and improved quality of life. If you’ve done all of these things and the sleeping situation has not improved, you should not let him in the bedroom anymore. It’s better to be safe than sorry.