i wouldn't mind doing this like i have suggested a long time ago before, but i only care to do the work for it, not the preparations it requires.
by this i mean i have only played 5.4 for about 2-3 weeks in my life. then after playing it for a short time i quickly decided to just from scratch start my own because it wasn't that good.
So i do not know what all the heros have as far as skills go. and i also dont want to get each hero in 5.4 and find out. If someone wanted to provide me with all this data i would do it probably.
just a thought here bond, how about you make your own custom heroes with spells so you could balance each one of them? dont have to copy every hero from 5.4 you know