There’s two skills that my PCs won’t ever need in Legacy: nature (intelligence) and survival (wisdom).
Lets swap the wild for the city.
your intelligence factions check measures your ability to recall lore about gangs, noble houses, communes and other likewise associations. You know about their leaders, their goals, their gathering places and you can identify members of these factions from their colors, symbols, graffiti, etc.
your wisdom streetwise check lets you know how to better navigate the city, orient yourself (can help you lose someone stalking you in a contested check), find a specific location or person and allowing you (and those you guide) to save time moving around the city. You can also have knowledge about how dangerous an area can be and what to expect from its denizens.