It looks as though Ballana will be our first objective when we attack Nubia in four turns. Since we can only build garrisons on our own territory, that attack will have to go without, but we must be certain to first take out Ballana's own garrison, as we'll need to do in every city attack in this campaign. After that, since the Nubian cities are tightly packed, supporting each city attack with a garrison built next to the previous city should be easy. But we haven't got enough slaves and foreign workers in the area for the job, so those now between Macao and Samarra should hurry to the front.
Or if Tusker prefers just to declare war and let the fast Nubian units come to us at Anyang for four or five turns, that would be fine, and a good response to our shortage of infantry. I'm pleased with how that approach worked versus China.
We have very few infantry units at the front--only six, and that's counting three obsolete arqs. Waiting until we can fully correct this would take too long, but at a minimum we have to comb as many musketeers and musketmen as possible out of our inactive areas and send them towards Nubia. Every Chinese city with three infantry units can surrender one, city happiness permitting, and by replacing each other in cities AW-style these units can reach the front fairly quickly.
We have some cities so weakly held--Ellipi, Assur, Hangchow, and Canton at least--that they could be lost to one invisible attacker, especially since lawyers are in play now. We'll need to correct that.
We should reserve the settler we'll receive in five turns to give us a safe place to heal units, either in the Nubian campaign or the next one. I don't see any spot for a normal settlement that wouldn't require a huge amount of worker service to be productive.