There is nothing to link Darwin and Canberra together other than being territories.
Give Canberra its own team, possibly with Albury getting 1-3 matches.
There would be 6 or 7 cities ahead of Darwin in the pecking order - most of whom shouldn't get new/an additional team.
I agree with Canberra with a few matches away. My preference would be nine in Canberra and one each in Albury and Wagga.
The NT definitely couldn't sustain 11 home games. The only alternative I could see would be the previously mentioned "northern" team shared between Darwin, Alice, Cairns and Townsville, but it would be very nomadic and hard to pick a central base.