Well its pretty straight forward, but damn does it make you a lot of shards. Assuming you dont care about getting a bunch of stupid sets.
Get 2 other buddies and go the the events. Make sure one has D/E load have him load up on all of the necrotic runes that he can, and then after about a hour you should have accumulated well over 20 void shards which counts as 40 large pris to split between the 3 of you.
If you want to make gold, i would suggest saving them until they are in demand again(at level 80). Where they were probably be worth 25g+ each.
I WOULD ALSO LIKE TO ADD THAT IF YOU HAVE SOMEONE OUT OF THE GROUP AND YOU WIPE. THE BOSSES RESET SO YOU CAN KILL THEM ALL OVER AGAIN.