you need to get a better number for your CYA so you know what your shock level is. Sounds like you might have a pretty high CYA, so seems to me shocking to 20 or 25 would not be out of line. I don't know what "halfway to the scale that starts at 100" means, so until you get better numbers, that's all the advice I have!

With a TC of 2 and FC of 1, that means CC of 1, so you need to shock until CC is 0

Is the pool plaster, fiberglass or vinyl?