Yes, an offset altitude field would do the trick, that’s it.
I’m done playing with DD FLY tab and “Advanced” settings and managed to manually get about the same crosshatch and number of pictures with different altitude settings by reducing the overlap fields down to 40%.
This is very cumbersome and far from ideal, not to mention laborious pain task.
By the way I revised the post above, there was a lot of mistakes in AGL acronym usage, sorry for that.