It feels like the events are bit more difficult since H&H. I am playing solo and I just got 18 Greydwarfs, 2 Brutes, and 2 Shaman. I beat it but holy! I beat it because I ran and hid behind trees to regen stamina and health and prayed I was out of LOS for rocks and poison. Waves would be fine but this was like a dwarven D-Day.

EDIT: That is the trophies that dropped. I dunno if every kill drops one.