If my barbarian has a +1 Furious Greatclub and my cleric friend puts a +2 greater magic weapon spell on it, what will the enhancement bonus be while I rage? +3, +4 or other?
FAQing because I think that the answer will also play into the question of how greater magic weapon interacts with the Grayflame effect upon an already-enchanted weapon. It appears to be a similar situation except replace rage with channel energy.