If someone finds any mob that other one needs, he could invite him. What do you think?
I need 7 rares and 6 champions:
Fallen Cur - Champion (Ancient Path)
Dust Imp - Rare (Storm Halls, Unknown Depths)
Sand Dweller - Rare (Desolate Sands)
Skeletal Sentry - Rare (Sewers of Caldeum, Forgotten Ruins)
Skeletal Raider - Rare/Champion (Storm Halls, Unknown Depths, Assassin Chamber)
Skeletal Marauder - Champion (Battlefield Stores)
Mallet Lord - Rare/Champion (Silver Spire level 1 and 2)
Subjugator - Rare/Champion (Gardens of Hope level 1 and 2, Silver Spire level 1, Hell Rift)
Armaddom - Rare (Gardens of Hope level 1 and 2, Silver Spire level 1)
Armored Destroyer - Champion (Silver Spire level 1 and 2)
Subjugators and Sand Dwellers spawn, but don't tick!
The others haven't spawned yet for me.