1) No one has heard of such a magic item and they wouldn't expect it to exist, Sending's the kind of spell that's hard to make into a magic item.

2) No. People have tried to invent a communal version of Owl's Wisdom, it's a thing you can do with some spells, but they haven't succeeded. 

3) No, short of building a magic item that casts that cleric spell, which does among other steps involve casting the spell into the item.

4) Over time wizards notice efficiencies and can eke out more spells. Clerics tend to get more spells from their god as they rise in their god's service. That's about it. 

1) No one has heard of such a magic item and they wouldn't expect it to exist, Sending's the kind of spell that's hard to make into a magic item.

2) Mass Owl's Wisdom is sixth circle but it does exist and would get all the girls at once. No one has it prepared today and no one but the High Priestess can have it tomorrow.

3) No, short of building a magic item that casts that cleric spell, which does among other steps involve casting the spell into the item.

4) Over time wizards notice efficiencies and can eke out more spells. Clerics tend to get more spells from their god as they rise in their god's service. That's about it. 

1) No one has heard of such a magic item and they wouldn't expect it to exist, Sending's the kind of spell that's hard to make into a magic item.

2) Mass Owl's Wisdom is sixth circle but it does exist and would get all the girls at once. The High Priestess can have it tomorrow.

3) No, short of building a magic item that casts that cleric spell, which does among other steps involve casting the spell into the item.

4) Over time wizards notice efficiencies and can eke out more spells. Clerics tend to get more spells from their god as they rise in their god's service. That's about it.