I like that. Forcing the lower area's to be killed in order for Resinjima to pop would be nice since nobody kills anything but Reisenjima anymore for the most part on Phoenix and newer people may not get the kills on Ru'Aun/Zitah for a long time now.
I would add a delay between spawns after one dies though, to give people time to reach each one before it's dead, like the 10min warning we have now. Once one dies, you have 10min before the next one spawns.
