" Take notes and ... hope for the best."
That's pretty much what I've been doing. I guess I'm not looking for a formula (which I'd only ignore anyway) but for some idea of how the "failure" comes about -- whether there's some kind of progressive "desensitization" (for lack of a better word) at work which generally would make my way of shooting in those situations self defeating.
I haven't yet found anything on the Ilford site that helps much. I gather the issue doesn't come up often (!?)