Additionally, I believe that if you have two mandatory triggers competing, then whichever was played/activated first would take precedence.
For instance, if you had both Nicanor and The god of this World in play, only the one that was played first would take place. If TgotW was down first, only your opponent would draw 1 and if Nicanor was down first, you would both draw 1.
The god of this World (TC EC): … If an opponent would draw because of his special ability, he draws one less.