See if your owners manual gives you a min. and a max. oil level.If your bottoming on jumps you can increase the oil level a few mm and get a better resistance to bottoming and should keep the stock feel.This would also depend on the type of fork you have either KYB or Showa.
it dont hurt till the bone shows.
I'd try 100mm to 110mm for starters maybe go to 95mm if your still having problems, anything past that you may hydro lock the fork before the bottoming cone, if your still having problems then bump up the compression stack a bit.