So if I'm understanding correctly, it sounds like the VCI was the highest, and then PRI and PSI were in the same area, slightly lower than VCI, while WMI was much lower than all of them.
That lends support to using the GAI, I would say, as the view would be that the WMI is artificially lowering the FSIQ.
I'm going to throw in another thought, which is that if, as I suspect from your description, the VCI is a good 10-15 points higher than the PRI and PSI, that would suggest that even the GAI is a low estimate of overall cognition. Not that I expect GT screeners to view it this way.
Not to scare you or anything, but, in the category of things to be/not be concerned about: just how low was the WMI? Was it both normatively (<90) and relatively (<
...pronounced like the long vowel and first letter of the alphabet...
