-play boats with levels matching boat
-be the one to kill boss
I play farm th with 40k/9k(buffer)/63k and NEVER get pearl . Prize was card/lv4 syn BOTH cards every time and EVERYONE.
but when we invite rank2 and 100k power everyone got junk pearls except for the person that killed boss
and a third theory is to do more damage than everyone. It would make sense for the developers to implement a way for afkers/weaker/lazy people to not get as good prizes as the person that actually tried. so if you want to get good prizes: don't invite some 5x your pwoer to carry you through a boat
^^^i was strongest on the team and killed boss^^^