This suggests a doable itinerary will be Lisbon ► São Miguel ► Faial ► Pico ► Lisbon. You can shuffle the order on the 3, assuming that São Miguel is both at first or at the end of the vacation to benefit from the ferry link from the Triangle islands. https://johnbestmarketingtools.blogspot.com/2022/05/azores-vacation-active-getaway.html