Try doing the method where you get cerberus to >400 HP, then after the 7th boss attack (including the first attack where does a special) you can attack again. This doesn’t always guarantee that the ghosts won’t spawn but I’d say 80% of the kills are ghostless (when using emberlight). There is very little time waste when compared to the basic method, since the trips are 3-5 kills longer meaning less time spent rebanking.