EVENT_AGGRO question?

[ChaosSlayerZ]

Does EVENT_AGGRO only triggers once? or does it triggers every time someone aggroes the mob /gets added to hate list?

For example Player A aggroed the mob, EVENT_AGGRO was triggered, now Player B joins in and starts beating on the mob to - does EVENT_AGGRO will trigger again?

if its not - how could I detect every instance when new player/new mob gets added to the hate list beyond the first?

thanks!


PS. One more thing if EVENT_AGGRO only fires once (until mob looses all aggro) then how its different from EVENT_COMBAT? Aren't they then redundant?