DarthThrawn
Bloody Eldar
Orbital scans will more than suffice to tell us where the greatest concentrations of people and functioning infrastructure are, which is really all we need to get things started.Orbital scanning, in a chaotic scenario like this, will give... unsatisfactioning levels of information. It will give something, but we will definitely want more. Can't even count hidden\sheltered people properly, and there will be plenty of those.
We will certainly want ground recon missions in major population centers and in some samples of other areas in addition to that.
At least i'll be doing that. Dunno about you.
So, who is going to take care of what regions?
Anyone who's somehow managed to hide themselves from the combined sensor arrays of a fleet of dozens of Tech C warships is going to have to deal with being left behind. We don't have the transport capacity to save more than a very small fraction of humanity, and we don't even have the lifting ability to fill our transports in the amount of time that we have, so we need to focus on those who we can most easily reach rather than having to drag them out of underground bunkers or whatever.