help needed with pcv route

You should be fine with one connection to the intake, just cap off the others...
But won't hurt anything to make more connections either.

I would tie the PCV in at the intake manifold, not at the TB or CAI. The latter options can contaminate the TB and MAF with oil over time.

The pcv system has a suction point which we all should recognize as obvious. Usually it's the tube coming off the underside of the upper manifold. That tube sucks air out of the crankcase, usually through the hole in the back of the lower manifold.

Theres another important connection. It's the supply route. By supply I mean the air thats getting sucked out of the crankcase has to be replaced by incoming air. Ford puts that connection at the throttle body. They do it for a reason. The reason is to make sure all ingested air is measured by the MAF. So, if you need to clean your throttle body now and then, so be it. But if you slap breathers in the valve covers and call it a day, you are ingesting un-metered air which can mess with the ECU's ability to manage things.

I should mention that in a boosted application there would be an exception since the intake gets placed under pressure at times, rather than always under a vacuum such as in NA applications. Anyway, who can give me a good reason why the pcv air volume should not be measured by the MAF in just about any NA application? It's getting ingested into the combustion chambers so it should be measured.

What are the alternatives to connecting at the TB while still being measured by the MAF? How about in the intake tube downstream of the MAF but upstream of the TB, rather than directly at the TB?

I had assumed you were equipped with MAF. With your setup I’m not exactly sure what would be best. Hopefully someone else will chime in and help out