It looks like one set of legs/torso is used 3 times (Castellant, Grandaxe Errant, and Grandlance Errant), one set is used twice (Relictor and Grandblade Errant) and the duelist one isn't duplicated at all. Quite weird.
Edit: In the battle scene photo it looks like there is someone with a Grandhammer as well, so maybe that's the other duplication for the Duelist leg/torso set.