Your cats only defense now is his biting, so he will do more of it to signal when he's had enough or when he's playing. If he had his claws still, he would probably bat at you more than resorting to biting but his feet probably hurt or feel odd to him, so he refrains from using his paws. That's the reason he's biting so much. Not what you want to hear but that's from my experience with declawed cats.
And his feet will be more sensitive to litter types too, so you gotta go with softer litters that won't irritate his paws. My grandmother had all her cats declawed, and all of them started to stop using the litter box not long after they healed up. I got them different litter after asking my vet about it and they started using the box again. And they all bit more often as well when played with. That's just something he's gonna do for the rest of his life now. I guess you could try to toy train him more? Get him to bite his toys in place of biting you?
On a side note:
I do recommend when getting another cat, don't declaw. Biting has way more bacteria and higher chances to give you an infection, as I learned after having been bit by a food aggressive kitten when mistakenly trying to take food she wasn't supposed to have away without proper protection. I had to go to the hospital because of how rapid the infection was, and was told half my hand may be amputated if it started to become gangrenous and continued to not respond to antibiotics. I've yet to get an infection from a scratch, especially since they're so much easier to clean out than a circular puncture wound.
I do understand where you're coming from with having stitches from being scratched (was mauled by a dog as a kid), but not all cats are going to scratch you that badly. Especially if they love you, like Lucifer seems to. And you can train your cats to avoid your furniture and your body through less invasive means. It takes more time, yes, but it's proven effective for me 9 years on with my first cat. Just food for thought. Lucifer is adorable