Any reason for Diadem (Easy)?

[CyrilLucifer]

Uh do you not like gatherers for some reason?
Half the time people don't even say anything... one line of "hey can you help me kill this monster?" and I'll stop gathering and help out. Don't assume everyone wants to kill all the monsters all the time.

This sounds nice on paper, but in practice, my experience with this, without exception, is as follows:

The Gatherers are halfway across the map, so by the time they actually reach the mob, it's half dead. They just come so that they can lot any 210s that drop and not look rude doing so and because they don't want to actually do the harder, in the more annoying sense of harder, work (killing trash so you can pop NMs) while still reaping the rewards of it.

Which you are essentially admitting to in your post, at least, by saying you're not interested in killing anything but the NMs.