Its only stalling if the mob is claimed, so dunno what you mean by low level bats. Thats training

its different.
Since HNM's pop every 24 (+/-3) hours, when it dies is very important to know when it will be there the next day.
Simurgh dies at 6pm est, it will pop between 6-9pm est the next day.
Since JP time is EST+1 (swap am/pm) that means it will pop at 7-10 am JP time. Since thats a crappy time for them they beat simmy with onion swords dong nil damage but keeping it claimed for a few hours. now it dies at 2am EST (3pm JP) and will pop at 2-5am est, 3-6pm JP.
Thats stalling. <_<; and the reasons behind it.