For instance, with Faye Corrine and Daniel Chambers, these two don't actually count as "seeds", their lineage is the seed. Moreover, there can be multiple seeds of a single fallen deity.
Lord Owen even suspected that Fiona Corrine's and Daniel Chambers' master come from the same seed of a deity. At the face of two major evil beings - along with himself and a Tire-7 Monster, even collaborating with the Divine Wood doesn't guarantee success. Hence, he decisively chose to abandon the Divine Wood and escape.
These fallen deities preserved some "Divine Authority" and, to a certain extent, they can discern some clue threads. They are precisely using this method to look for the opportunity for 'Nirvana'.
Moreover, they can either sense each other; or communicate through some ancient methods. The Divine Wood can thus reach agreements with 'Fiona Corrine' and 'Daniel Chambers' for jointly hunting the Bronze Ancient Coffin.