I also think Fuji would need similar downforce level as indianapolis, being a half straight / half twisty track too. But indy has no quick turn (appart for the banked one), and Fuji has turn 4, which is taken at approx. 260km/h. This one needs reasonable DF level I'd say.
I'd say Bahrein and Spa are on the very low side of the "medium downforce list", while Hockenheim and Magny-cours are on the top, in terms of DF demands.