I am looking for advice how to estimate individual hand strength in function of opponent's hand range(100bb deep). I am getting confused sometimes in spots where ranges are wider then "usual" (hu, sb vs bb , btn vs blind ).
For example today i played a guy who opens 70% SBs, i defended K9o which is maybe a bad ideal maybe not, probably i should make a lots of bluffs to make it +EV.
But i defended and flop came 975ss which on the villain cbetted  and i decided to RR thinking it is probably strong vs his 70% open range, i havent checked cbetting stats but it is probably about 60-70%.
So i checked in flopzilla and he beats me on flop instantly 10% of time .. and i used this number as a i guideline so far(meaning if a hand get beaten on flop only 10% or less it is strong enough to stackoff). 
So i guess this method is pretty coarse and i dont even know if it is right, any advice would be much appreciated for estimating hand strength. ^^