I pay for a game, then it is my right as a paying customer to play the game at my time schedule, not some in-game time schedule. You don't have to wait 12 hrs at a laundry-mat just because someone else used the super-wash machine, do you?

There should be no waiting time for any HNM to pop. Give those HNMs a pre-conditon, like Iffy and other primals fights, where you are required to hand in a certain item. Let the players pick when we like to start the fight.

Concerns about everyone walking around with a certain unique item is moot, all SE needs to do is give it a low drop rate, or make the battle harder.

jc