This head is infinitely variable. You pretty much have to determine this for yourself, for each make of paper and developer. Grossly:
Hard (Blue) G (max), Soft (Green) A (min) ~ Grades 4,5.
Hard (Blue) A (min), Soft (Green) G (max) ~ Grades 0,1.
and everything in between.
also depends on your light intensity setting (0-10).
Might try split printing, for which this head excels.