I like a good mystery with the best of them, but....
Are you referring to Fuji Neopan Acro
s?
What developer are you referring to?
Have you checked out whether Ilford's website has a recommendation?
Have you checked out whether Fuji has a recommendation?
Do you realize that the data on the digital truth site (Massive Developing Chart) isn't necessarily checked by anyone?
In essence, it is a collection of different individuals' experiments, with a few manufacturer's recommendations sprinkled in.
And it misuses ISO.
Now that I've got my grumpy rant out of the way
, when you are dealing with something unusual and exotic, it can be helpful to look at information about what others have tried. For those unusual combinations, the Massive Development Chart is at least interesting.
And with respect to reporting what film speed was used by the experimenter when metering, the proper nomenclature is EI (for exposure index) rather than ISO, unless that experimenter performed their test under the strict conditions defined in the ISO standard. If someone refers to the EI they used when metering, you will have at least a sense whether they made exposure decisions that favour shadow exposure (low EI) or highlight exposure (high EI, often accompanied by a contrast increasing "push" development).