OPT3101: Expected amplitude after illumination xtalk calib and calib parameters using external temp sensor

I have following questions:

1. Expected amplitude after illumination xtalk calibration (with Rx or Tx covered)

In document sbau310, P.7, 4.2.3, says that expected crosstalk amplitude is below 200 codes with highest LED current.
But in document slau791, P.14, 4.2.1, says that the expected amplitude is below 10 codes.

Which one should I follow?
What should I do if I can't make the amplitude below 10 codes?

2. Calibration parameters using external temp sensor

Is the main purpose of external temp sensor only to calibrate phase offset and cannot calibrate illumination xtalk?

According to what I understand, the supported function of internal/external temp calibration is as following list:

What if I set both internal/external temp calibration parameters?
Is there a register that can control which calibration parameter to use?

Is there any better to use external temp for calibration than internal one?

I'm working on calibration of our new design.
I was planning to start collecting data in thermocamber this week but something gone wrong.
So I hope I can resolve the question above asap. Thanks in advance.