Re: Gilean/Oghma

IMO, deities who don't have access to a specific crystal sphere have to rely
on their fellow deities and missionary priests.  For example, Gilean and
Oghma might well exchange information on their respective spheres.  If a
priest of Oghma sought answers about Krynn, Oghma might have the info in his
library--or he might have to check with Gilean, and vice versa.
As a side note, Oghma is not just an FR deity; on the greater plane, he's an
important figure in the AD&D Celtic pantheon, and IIRC was drawn (like most
of them) from the Tuatha de Dannan.