I've run the first five parts of Doomsday Dawn thus far in public play and I have been having a good time. Unfortunately, a few of my players who desperately want to "win" Pathfinder argue that basically everything the enemies do provokes attacks of opportunity, which they all multi-classed to get. They argue that everything with a tag of magic, a school of magic (such as evocation), or similar tagging constitutes casting for purposes of provoking.
Do you consider all innate spell-like abilities to be casting for purposes of attacks of opportunity?
Are breath weapons considered spell-like for purposes of provoking attacks of opportunity?
Do special abilities with spell-like effects (e.g. Dance of Destruction) provoke attacks of opportunity?