I'm converting over one of my old campaigns from TOG to Fantasy Craft, and one of the major elements of that campaign is a party of NPCs that sort of serve as foils to the PCs. They're independently investigating the same matters the PCs are, and over the course of the campaign the two parties cross paths several times, help each other out in several points, and later in the campaign, when the investigative phase is done and it's time to choose sides in the main underlying conflict, likely end up at odds. Sort of a glimpse at an alternate route the campaign could have taken, given a different set of PC backgrounds (most particularly, if the PCs were natives rather than outsiders to the region and culture in question).
With NPCs being built on a totally different from PCs, I'm not sure what would be the best way to convert things over. What XP total would be appropriate for a special NPC more or less on par with a single PC? Should I try to eschew the usual a la carte approach of NPC creation and instead pick sets of abilities that would be similar to the packages it would be feasible to acquire with a given player build?