In general, I think that the most correct solution, according to RA legislation and openstreetmap, is to do it this way:
4 - provinces, Yerevan city,
5 - communities,
7 - cities, administrative districts of Yerevan,
8 - villages,
9 - neighbourhoods
p.s. I want the communities of Armenia to be in 5 level, because its boundaries are more noticeable.