The strategy they have employed is one of:

"Recover The Emerald Tablet first."

Therefore, if any our rivals get hold of
the missing Chess Service, with the resources
of The Vatican, we can use the blueprint
of the Emerald Tablet and craft another one
for The Church.

They also know that the languages of The
Rosetta Stone are map locations of cities.

Which city, where, and how they "work together",
their team is now applying thought to that.

They have only one of the three city locations:

OIA, GREECE.