theory Q, how often to bluffcatch when raised

if we believe our opp is bluffing the river at some frequency (not really sure how often), lets say we bet and he ch-raises - we obv call or shove with all our value nutted hands, but how about part of our range, that we were vbetting, but now, once get raised all these hands become bluffcatchers - how do you determine how often you need to call in this spot, what is the worst hand you start calling with, KJ+ or KQ+ on K93r42..?

basicly for ex I`m getting Ch-raised on K72r84 (no flushes) river - i believe all my 1 pair hands are bluffcatchers, but my opp is bluffing some % of the time when he ch-raises - lets say 20% time, do i call here with like KQ/AK/AA as it is top part of my bluffcatching range, or i can randomly call with any bluffcatcher, but certain % time? basicly how do i avoid being expolited with my stronger 1 pair hands, when i know my opp IS bluffing at least some (unknown) % time..?

is it correct to be calling with top part of our range almost always (if we believe villian is bluffing some/enough % time) and fold out bottom/mid part like always?

if im reading this right then Kx = 66 in this spot, so u can call with any pair almost

depends on too many things like how we got to river, opp reads are very important, stacks.

yea 66=Kx in terms of that our hand is a bluffcatcher (even though Kx is better since it has blocker to stronger Kx/2pairs), but Kx is in top of what we can have in this spot, so maybe we should balance our bluffcathing strategy by always calling with certain top part of our bluffcatchers?

plus Kx beat random merged balanced vbets if villian is any good

Lol so few villains are value c/r raising worse than Kx on this river like ever, without some totally weird dynamic, so that last part is going to be pretty negligible all the time, especially since we prolly aren't value betting all that many hands worse than Kx (depending on prev streets action.) So no villain is gonna wanna take such a bad risk/reward ratio to target such a small part of our range for value.

As for what we should call with, if we wanna take a balacned strategy vs villain, play with him a lot etc then we obv wanna choose the top of our nluff catching range to call with if we feel it'd be exploitable calling with all or none of it. In a vacuum though 66 can = Kx here if villains c/r range is polarise to sets or air, i.e he isn't raising KQ for value, since this will often be the case.

This seems like it is tough to answer without actually analyzing a certain hand or better yet analyzing a certain player. Since, every player is different. Some will bluff on certain types of boards on the river a high % and some will not. It is also really hard to answer this without knowing just exactly how you got to the river against a certain villian. You really need to know what HIS range is and know what he thinks YOUR range is