That’s not bad. Deadlifting is an artform to me and takes practice. I freaking love them! The way I feel after a big lift. I’m addicted to othem
Dont worry about chasing numbers. Unless you plan on competing in powerlifting, you need to lift for aesthetics. Focus on perfect form, and activation of the muscle. Try the smith machine standing shoulder press. Both in front and behind the neck. In my opinion, shoulders respond to a lot of volume under lighter weights. And you are correct, shoulder injuries can be a real concern.