While I didn't find this worthwhile testing, I should note I found a source here:
https://web.archive.org/web/20010618...Planes/Air.htm
It states multiple times that any splits / trigger spawns have an 80-minute despawn timer.
So I am assuming that it would be impossible to have 'multiple repops' of the vanquisher guards up due to this mechanic.
Note that you wouldn't expect the vanquisher guards to simply despawn after 80 minutes of waiting. Classic EQ a lot of static mobs simply despawned and instantly respawned if left up too long.