Just saw that the Trojans cannot have a fortified camp (while the Achaeans can...).
Surely the Trojans walls can be classified as Superior Walls ?

The Trojan camp is flexible - so fortified when defending.  Actually a good case for being Superior. 

Richard

I see. 
I was too narrow in my view of 'invading', seeing it as an attack on the Greeks but still within the reach of the walls. But I presume you mean with 'invading', attacking another country, which makes sense in that case.
Of course not sure if they would qualify for a Superior mobile camp .
Unless a new category with adjusted points - Superior Fortified 'camp' when defending, average or poor mobile camp when invading, but probably not worth the effort.