SUMPRODUCT-formula with changing conditions

Hi, all

I have a few varieties of SumProduct-formulae that are very helpful when dealing with numbers and/or letters in set conditions.
Like this one, which counts rows where conditions are met in four columns:
=SUMPRODUCT(--(Z413:Z432="G");--(AB413:AB432<-3);--(AC413:AC432>0,4)*(AD413:AD432>5))
and this one, which sums the values of the same
=SUMPRODUCT(--(Z413:Z432="G");--(AB413:AB432<-3);--(AC413:AC432>0,4);--(AD413:AD432>5);(AD413:AD432))

How does one make these two do their respective jobs when one or some of the columns are conditions for the next column - with their changing values, and thereby changing conditions?

Instead of "bigger than 0,4" as the condition for the AC part, it should be something like "bigger than it's AD counterpart" (AD value on the same row).

I have a few combinations of these "internal" measurements to do (the AB in addition being < than a certain percentage of the AC, and so on) but first of all I need a solution to the placement of the > and < signs. Any tip on that part of the problem would be very useful and much appreciated.

As mentioned, it will sooner or later also have to deal with the condition being > AD - multiplied with a value in a reference cell. I fear it might take more than just tossing the cell reference into the parenthesis?

Thanks in advance

BCB