So I heared, this is not so easy to manage.
So here are some karma/contacts rewards.
Everyone gets 20 karma for taking over the farm.
Wheely gets 3 more karma for retrieving additional paydata leading you to the RCC's.
Sovereign gets an additional 2 karma for saving the day ( and torching expensive buildings.). He also gains a point of notoriety and a new free spirit contact named Crimson Sky (Connection 1, Loyalty 1)
Kynos gets 2 karma for orchestrating much of this run and RP.
Kynos and Ayato can add Nagisa as a decker contact (providing they don't kill her or treat her poorly). She is Connection 4, and loyalty of 2. (and vicious with the data spikes.)