P138, under all-purpose purviews<br/>"Every boon from the all-purpuse purviews must be purchased separately. They need not, however, be purchased in order."<br/><br/>So no, you don't have to purchase the 1 and 2 dot power in order to get the 3 dot one.<br/><br/><br/>For the Pantheon purview, you do have to purchase them in order unfortunately, which means paying the cost for each. Its when you start paying for pantheon specific ones with XP they start to work out cheaper than the general ones (4XP times current pantheon purview level to get the next dot and power)