Hi Doug,
The nacelle, including the generator and possibly the gearbox, is by far the heaviest part compared to the rotor and the blades. An example of a 1 MW wind turbine:
ELKRAFT Avedøre 1MW - 1,00 MW - Wind turbine
Rotor
Diameter:50.0 m
Swept area:1,963.0 m²
Number of blades:3Weight
Single blade:3.6 t
Hub:12.8 t
Rotor:23.6 t
Nacelle:91.2 t
Tower, max:95.0 t
Total weight:210.0 t
As you have repeatedly demonstrated that the very large mass of the generator cannot be reduced too much, otherwise it would heat up and break, the Kiwee type rope-drive ground-based generator wind turbine should prevail in this AWES category.
Lightening the hub and main pulley should help reduce weight when scaling. The Magnus balloon is a lightweight option for rope-drive transmission, but giant, lightweight pulleys, such as ring and spokes, could be considered.