Yeh I knew that bit of the quest. I've started saving the few keys I've got so I don't have to farm them once I finally get the bounty to drop.@Dargonk - I forgot to mention, once you first hand in the bounty, you've got to open the chest on a 32 or above to get The Cipher, then hand that in and wait to be summoned.
Also;
When you say bosses, is that only the final round boss that counts towards the win. Or would you have been able to do I think it was the 34 this week that has three of the early rounds with the boss type levels and get 3x350 from each run?