Which stock shaft is best?

What would the cutoff be for x-stiff vs stiff? My driver ss is 105-108. Would you recommend stiff or x-stiff if I'm looking at the s+ 82 for a 19* hybrid? Thanks!

I purchased the diamana stiff shaft in my fairways S+ 82 stiff & hit them a too high, costing me some distance. My driver ss is somewhere between 100-105 range - 153 ball speed with 913 D3 head & the stock Diamana D+ 72 stiff shaft (low launch/low spin)and continued launching over 14* with only 245 carry & 255 total. Last year I played the Fujikura fuel 60 x in my driver and loved it, I just purchased a Fujikura Fuel tour spec 60 stiff (Patriot edition) to replace my 913 driver shaft looking to lower the launch angle & increase the ball speed. You may want to look at the Aldila Phenom 80 shaft or Aldila tour green atx shafts, I found the diamana + shafts to launch higher than expected, you may like the D+ in a tipped stiff or X flex.