[Norfleet]

I'm guessing that the effect of wishing for dominion is not sufficiently powerful to overcome the effects of the large number of temples that exist in the game. There's a certain element of dynamic equilibrium that governs dominion coverage, that tends to be somewhat resistant to anything short of an organized and sustained effort to alter it: Wishing for Dominion doesn't give you more temples, nor more priests preaching, nor remove those of the enemy's. Thus, it probably won't make a prolonged impact.