I have played around with the optimization. What I really want is a means of optimization without having to change the character map. That is, both font screens map to the same optimized character map. In that way, I can then convert the screen to .ICE font files and load the super IRG font into my ICE editor to do touch ups.
Graph2font has been an integral part of all my graphic experiments.
One way of improving the speed is to see if you can come up with an algorithm to optimise characters and remove duplicates. I have been trying to do this awhile now, but doing this would reduce the number of fonts needed and the cpu time needed to flip the display.