AFAIK CharacterLeftRegion triggers don't trigger if you leave the map via unconventional means (eg. rift travel)
Also it'd require seeding the map with hundreds of region triggers for each encounter
CharacterEnteredRegion(_Char, _) should work just as well, and is more elegant than having an arbitrary number of time between respawns. It doesn't really matter when the event gets called either, so long as it does get called at some point (after the party has had a chance to move away from their last encounter).
I could still use some suggestions on what to do about the experience though. I don't think there is a way for me to see what their 'Gain' value is for an exp calculation (like what they normally give) to work properly.
