Basically the general idea of what I was saying is that we can use villain's TAF as a pseudo-range indicator.

For example, if an opponent with an aggression factor of 3.0+ checks the flop with the lead, it gives us a lot more information for reducing his range because it's the action he takes least frequently.

The more frequently an opponent makes a certain action, the less information it gives us to reduce his likely range, because he's taking that action with a larger percentage of his range.

I think a better example is the converse situation.

You have a 15/10/0.7-1.0 nit, who almost never bets the flop without a strong draw, or at least a pair with a decent kicker.
If he bets the flop you should probably only continue with well disguised draws, and TPTK+. Why? Because this nit only bets for value. His range constricts significantly when he bets the flop, because only a small percentage of his range could've connected.

It's kind of an extension of your theorum. You should be more likely to bluff if your range is ahead of their range, but you should also be more likely to bluff if villain (in a HU pot) takes a line that goes against their natural tendencies.

I mean, can't you almost raise a nondescript flop almost every time when a 3.0+ aggro monkey bets, or bet the flop when a <= 1.0 nit checks, just because their range is air so much?