In Century: A New World, Native Help cards allow one to use less settlers than normal when activating a location. When a location already has opposing settlers, you usually need to place the number of settlers already present +1, regardless of the location's cost. Does this also get reduced by having Native Help cards or do they only apply to the base location cost?
For example, if a location has 3 of an opponent's settlers and I want to oust them while having an appropriate Native Help card, do I need to use 3 or 4 settlers to do so?