I'm on the S2, however I simply can't tolerate any missed samples, so it's only acceptable for my use case if I can alter the Arbiter's priority. As you can see I've been attempting to do so with poor but not completely negative results. The question in my mind is whether all of the remaining issues...

The API documentation insists that ADC2 and Wifi are not to be used together. The datasheet however notes the Arbiter built into the chip, which is clearly intended to enable this functionality. Wondering whether a feature in the silicon had in fact been abandoned by the API team I gave this a whirl...