As I understand, all is simple:
1. Epic boss event (to kill 100/150 or any number of bosses) goes 6 days.
2. "Ending Violeta" and "Exterminating Violeta" goals shall be done in 5 days like speed master in FLTQs
Don't ask me how is possible to do six daily goals in 5 days... This question is to Gree.