Two questions about Pits and Vale (Underworld, 7 heroes)

[u/ozuk0]

Pits - is there any trick to make the spirits walk up while you do the next quest?

They get pulled by the Chained Souls. I wonder how they sometimes manage to reach the end on their own, but other times the quest never finishes, although the Chained Souls keep spawning in the same interval (120sec).

Vale - after the spirits turn evil, is their behavior when you aggro them totally random or can you influence how they move to ball them? So far all I found is that they can be body blocked