Naga rank C, seriously? It is literally LPV's non-premium counterpart, it exchanges 29 hp and 35 physical resistance for +9 cooling(but -8 capacity), +10 energy regen( and +6 energy cap), and 11 kg less weight no way that is C tier, that is definitely a solid A-A+ tier the -30 physical resistance might look bad but little light weight helps with it.
Sorry for being late and reviving pretty old topic but for me-
S+: lpv, mpv
S: energy free armor, fractured heat armor, rusty energy armor
A: hollow spectral armor, naga, nightmare, windigo
B: zarkares, brutality, archimonde, all 3 battery armors, hpv(just disappointed )
C- avenger, sith
E: interceptor(doesn't deserve D tier even the stats are just so awful low weight cannot compensate this)