Same old story - End one mission, start a new one. Here's a 7 part mission that will introduce a couple new ideas for completion. Normally, it's ask for help, job, rob, fight, build and ask for help again through the mission. This one has plenty of those, but with a few new steps. Hopefully they'll keep coming up with new ideas and eventually drown out the ask for help steps. Without further ado!
Get 5 Mafia Supports, Ice 6 opponents. Pretty easy and you get 2 Life Savers (consumables for the limited time Smuggler's Haven district).
Recruit 3 Crew in Brazil (you may have to activate some to clear the way) and the job costs 126/189/378/756 depending on your mastery of the new tier. Great loot and some Brazil cash.
Win 25 fights. Activate 3 crew in Brazil (may take up to 8 hours to clear queue). Jobs costs 99/148/297/594. Vehicle is pretty weak at this point in the game, but should make most mafias.
Travel to Italy. Collect from your Villa once (4 hour timer). Job costs 56 energy on Ruby. No loot, but you get $1 billion NyC cash!!!
3 more supports from your mafia. Take out 15 Assassins (4 Stamina on Fight List). Again, no rewards and no cash.
Travel to Vegas. Job costs 57 energy on Ruby. Rob 9 times (successfully) in Vegas. 2 more Life Savers to help with Smuggler's Haven.
Fight 25 opponents (and win). The Bird Brained Billionaire is 100 Stamina on the Fight List. The first step is the most interesting. "Acquire 5 Weapons". All you have to do is gain 5 weapons in your inventory. I built 1 from my Weapons Depot, purchased one from the Marketplace, looted an Idle Hands from robbing and got 2 Brass Knuckles. Not sure if gifting works, but this shouldn't be very hard for anyone. Kookaburra is 85/154, so the reward is pretty good. Good luck and happy hunting!!!