As with my other large population career cities, this was done at hard and using only a single barracks, although unlike Mediolanum all towers aren't road connected, so I replaced the barracks for each group of towers. The difficulty here is moving food around the city. Fishing wharves can produce good food yields, but a granary or warehouse must be very close to the wharf. Therefore there are a LOT of warehouses getting fish and fruit in this city. The prosperity is still 41, well above the required 30, thanks to a luxury palace block. I could have built more large tents and still achieved promotion but was close to the building limit. I could have deleted warehouses but wanted to leave them to show the logistics involved in moving this much fish around.
Unlike other high population career cities I've done, this one does not use forced walkers. The reason for this is that the blocks are rather smaller than those I'd normally use, as a result of the way the fishing points are spread out.