onedreamer
Dragon
are you comparing the +1 hammer per priest specialist bonus offered by spending 3 (or more ?) Great Priests with 16 more workable tiles ??? Besides, placing those 3 GP as great specialists would equal to placing 6 priest specialists with that Altar at the proper level, plus an additional +9 raw gold. If you're Good you're most likely to be able to cast Bless anyways. The main bonus is really the one of the victory condition...