Ok I have been tracking this achievement for the past 2 weeks and read this thread through and through and would like to tell you all that the post Siks said was true.


The next three pops are on 11-17(12pm midnight), 11-21(9am est) and 11-25(12noon est).


Its is DEFINITELY in a 4 day cycle and Im 99% certain it pops in the time cycle Siks said. Got mine today at 9:19pm est. The attack lasts 15 minutes, and there is only 4 total pops in a 2 hour window. Ex. 9:05-9:20; 9:35-9:50; 10:05-10:20; 10:35-10:50.


Good luck, I hope this helps, and happy hunting!!!