Given how outnumbered we're likely to be, and what Mechanis said about us later getting the option to automate production, I think we should get the best commanders we can.
This is also likely to not trigger Peaceful by having less experienced officers make tactical mistakes that get people killed
I'd be tempted by;
[ ] Force Captain
[ ] Warsinger Captain
[ ] Warlord
[ ] Warseer Commander
And I want the Khainite Warlord in particular as part of rehabilitating Khaine on his aspect of Khaine of the Last Hour.
Also worth nothing that we can have two HQ units in a detachment, unless I've misunderstood something,
@Mechanis?
We're likely to take time to ramp up our armies, so starting with the best officers while our forces are still small and fragile makes a lot of sense to me.