The kit I felt like would be fitting for any campaigning/occupying/defending non-cyrodiilic Legion would be the most obvious one. Maille! (Chainmail)
I love the multitude of influences on it. Norman, Iberian, Roman, fantastical etc. It makes so much more sense then fucking leather armor that's better in stats then Stormcloak mail. Morrowind had the Legion equipped with plate before Oblivion so I have no problem with the existence of full plate in that game.
That would have been the successor to the unique Morrowind look for the Legion, this is a mostly Nordic filled Legion stationed in Skyrim. Like fuck yeah include a blend of Imperial and Nordic <3