Determining 3bet range Value Range using PFR
So in determining a 3bet value range should you base that range on the midpoint of villain's assumed pre-flop raising range?
For example; a Nitty player has a PFR from MP of 6%. A 6% range is probably something like 88+ AJs+ AQo+ KJs+. So to determine whether you should make a 3bet for value would you take the midpoint of villain's assumed range and use that as your range for 3betting? If so, in the example above a value range would 3% which is JJ+, AK and if villain was a LAG with an 18% PFR your value 3bet range might be something like 88+ ATs+ AJo+ KTs+ KQo QJs
Is this line of thinking valid?
Also, not that it is really applicable at the stakes I play but for extra credit, if you wanted to 3bet for value AND add some 3bet bluffs, what ratio of value bets to bluffs would be optimal? And if you did establish a 3bet bluff range would it be hands just below your value range? or would it be better to polarize your range so that the bluffing
range might include small pocket pairs, suited connectors and small suited Aces which had some chance of flopping some equity and perhaps a well concealed Monster??
Finally it has been my gut instinct that a 3bet range OOP should be a litte higher than when IP as it is harder to control the pot when OOP, so if your 3bet range in position was JJ+, AK when IP, then OOP (in the blinds) you may wish to 3bet hands like TT & AQs which you would hate to fold but also hate to play out of position?