Thank You, that's a fair assumption. How do I expand upon it to build ranges? Both IP and OOP

Assuming the driest board in the deck of K 7 2r for example, how do different hands in my range want to play against such a player (mid pocket pairs, A high backdoors, etc.)

That's too broad a question. Depends on your range, your opponent's range, whether you're IP or OOP.

As a starting point, you should consider Minimum Defence Frequency. Say, they bet 3/4 pot. Then you have to defend 57% of your range according to MDF. Since the flop is a bit better for Villain's range, you can overfold, so it's reasonable to defend about 50% of your hands.

So go through your range, and see what hands you can defend (by calling or raising). Usually what you'll end up is something like most pairs, some Ace-highs (not all of them), and some suited hands with backdoor draws.

If you use a solver, it will tell you what kinds of hands you can defend. Solvers don't follow MDF, so their strategy can sometimes be hard to understand. Also, they use a lot of mixed strategies. It takes some experience, playing around with various boards and lots of simplification to translate it to a "human" strategy.

I am not using a solver as of now, trying to figure out things and calculations "by hand", but yeah, figuring out MDF and where am I in my range in relation to how often I need to defend is a good starting point, thanks !

There are of course more player types that cbet 1/2 to 2/3 pots on a dry board.
- against nit players that only cbet like 40% or less start 'over folding' and only continue with top pair or better
- against aggro players that cbet like 80% keep a wider range e.g. call with all pairs and not only top pair and perhaps even with two overcards and a backdoor flush
- .....

Really like this answer from belrio.
Totally agree that with what he said. They will have a wide range on the turn and probably will play a "bet the good stuff" or polarized strategy on the turn.
So if they check you can apply very agressive strategies (that´s what solvers are doing) as they probably at best have bluff catchers.
If you let solvers do their thing they just go overbet overbet on turn river if he never checks his nutted hands.
Sure you can´t do this everytime since villain´s gonna notice but you can apply the basic principle of playing agressivly with the hands you choose to do so.

So yeah, in reality it makes your life easier since you don´t have to defend so much. Also they probably sometimes check the flop and if you can figure out what they check there you can take advantage of that too.
Most of the time people check second pair/ third pair typish hands.