I've read a couple of places that a front squat should be 80% of your back squat. I can't currently remember where I found that number though sorry.
I'm not sure about a correlation between OHS and BS though.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."