Separate names with a comma.
Prestige means nothing, 2 hearts =/= level 9 -> 10.
Most likely not.
Kinghakaka has made a very good video, which should help you out by a ton and...
Or just don't taunt people who haven't done anything to you, what comes around goes around.
Not sure of the exact number, but I've seen proof of a couple. Not active in this season due to the horrible update.