MadSpy - of course, many thanks.
(I've updated the capx above)
I had got it into my head that the spEnimies.Count would only count the spEnimies selected in the conditions on the left and had totally forgotten ( if I had ever known ) about needing to use PickedCount rather the just Count. I wonder how many other actions "ignore" the conditions set ?
I'm off to read the manual again