i think it would be more than that to be honest.
boba fett is an excellant example of light mandalorian armor
jango fett, which is more or less what ordeyn described, is the template for medium armor
a good template for a light-heavy armor would be akin to the coverage of a neocrusader mando... full lower leg cover, knee's, thigh plates, full torso coverage, bicep coverage, elbows and full lower arm coverage. of course with a helmet. you could even say a template such as jango's with the addition of bicep armor, a kama and a pauldron would be a good light heavy. i consider my set thigh plates short of being light-heavy. it's more of a heavy-medium
a real heavy armor would be something like the clone troopers wear, full coverage except joints, even those are usually armored but not so heavily as to completly impair movement. of course, clone armor is not mandalorian armor but, it's based on it. so that type of coverage would be a good example/template for full on heavy armor.