Just for thought, the games I've played as a cleric, it was required to pray at least once per day and usually for an hour to stay in good grace and ask for spells.
The wizards had to memorize and perpare the elements so the eight hour wasn't unusual, but then they kept those spells until the next study session.
The priest could change spells more often with only taking time out to pray. That was where Withdraw was great so they could do that and spend and an hour praying in just a couple of minutes. The down side was they were completely valnerable as they stood there praying.
As for Nap, it is a level 2 priest spell, so if Tann would define is as a "Common" spell then all of our priest would know it, they may have just not thought of it. It is from the Priest Compendium but it still can be defined as "Common".
If Bossman allow Nap as "Common" in his world then each priest could cast it on seperate mages and in the one hour we could achieve eight hours study. The warrior types would have to protect the mages as they "Nap".
Edit:
This might be a good place where Valene pipes up about maybe helping with casting Nap, then the other priest slap their foreheads and say"Oh yeah, we forgot about that!"
