Hero skill tree.

I will definitely improve it! I agree, to reduce the number of options to iterate through, and therefore speed up the program, we need the ability to recognize skills and create a list of skills that should never be selected. This raises the question of what needs to be done first: 1) a list of prohibited skills that should never be selected, or 2) a list of only 8 allowed skills that can be selected, or 3) a list of allowed skills, more than 8, that can be selected. I think a combination of all three will be needed. But what should be done first?