How do anointed rings work in party play?

Couple of questions about how anointed rings work in a party of players. I play almost exclusively with guild mates and we are starting to anoint rings. Trying to figure out the best way to balance the rings.

1 - Do the buffs stack on a single player with the same anoint on both rings?

2 - Do the buffs stack from all players in the area? for example: if all 6 players have the same anoint on all 12 rings?

3 - If buffs don't stack, is it determined by the person who initially placed the tower, or the person who last upgraded the tower?

Thanks in advance.

Um I also want to know too.

hope someone can answer this

Haven't played too much as a party but I believe this is how it works:

1 - Yes
2 - No
3 - The last person to upgrade