Yes, the GD encourages self exploration after reaching a particular grade and that is what I have done. Obviously we are not going to find invocations for millions of angels, from the zodiacal archangels, to the Levi 4 kings and all. You seem quite confident in your GD methods as you have mentioned many times here and there.

I should write my own conjuration then and see which brings the heaviest shift in manifestation. John Dee wrote his own conjurations despite having access to the grimoires.