The problem with getting a NARC on any sort of fast platform is the size of the NARC itself.
I mean, honestly, a minimum of 4 tons on something that only has 6 tons for Guns total is quite the investment.
I'd still love to see it on more platforms regardless.
Obvious platforms where it would shine some.
SLDF Era or Later
Javelin, Jenner, Assassin, Phoenix Hawk, Wolverine, Crusader, Titan
Cyrano, Pegasus, Maxim
Clan Invasion or Later
Raptor-O, Strider-O, Firestarter-O, Menshen-O, BlackHawk-KU-O,
Harasser, Cavalry, Plainsman, Saracen, Drillson, Bandit-O, JES-I, Manteuffel-O
Its not much, less than 2 dozen platforms, but I think if even 1/2 of them were given a solid NARC variant it would drastically improve the selection of NARC options out there.