So for fun I wanted to see what would happen if I used a perfume during the Rising Dead wave. Surprisingly I found a bit of an exploit. As you can see in the photo below themed sylesti encounters are the only mob to bring the counter down and for some reason fighting the Rising Dead do not lower the counter.



(click on it for a link to a better, up-close version of the pic)

It's kinda set up for it to work that way.

That stage of the event is kinda different for spawn rates - probably the best solution would be to just remove the functionality of perfumes until that stage is over.

Thank you though for letting me know.