I'm definitely no juniper expert, but from my understanding I would not cut back to bare wood for two reasons.
#1 - Juniper's survival strategy is dieback. That's why we see all the old collected ones with awesome natural jin/shari. I would worry that if you cut something back too hard, instead of continuing to grow and recover, the tree would just cut its losses and say goodbye to that branch/trunk. It may back bud somewhere, but probably not where you want. It also might just die, which is usually considered bad.
#2 - In my search for info on junipers, I noticed a Ryan Neil video where he talks about the strength of junipers being their foliage. He didn't explain it very much and I don't understand it well, but I'll trust him for now and leave some foliage on my junipers.