I don't mind what you think of shipping, but that's a pretty inept opinion. He had the "Voldemort effect" on commoners; he sensed his imminent defeat and reacted mindfully; laid traps for the smartest pony to stumble into 1000 years later; but above all, CONQUERED A WHOLE EMPIRE, succeeding where the other main villains had failed! King Sombra may be a mightier figure than you seem to credit him for.
that's not a problem. Just ask other artists that are doing good images for the kind of brushes they use and what other side effects that YOU deem lacking in your images. I am not digital artist, yet, but when I get to your level, I will ask any one who is willing to help for aid. Do not let anything stop in your way.