I know I'm making more work for you as you got to clean up my shoddy code but at least the groundwork is done(hopefully lol).
BTW The more I looked into SE_BossSpellTrigger, they are all single target npc on client spells which would be handled with scripting so I think its pretty safe to combine these two functions together.
edit... seems like SE_CastOnWearoff is exactly the same as well except it is for client on client/pet spells and self only spells. The only spell that doesnt fit the pattern is
Temporal Lapse which contains none of the crazy restrictions/effects from live(cant cast if more than 90% h/e/m and it teleports you back to where you cast it) so I assume Sony did some fancy spell coding like we got recently for it. Other than that I think all 3 effects function the same.