[Lucas]

If it were me and, like you say, they are all in the same project and have the same context and lack any due date, I would start at the top, work my way down, and not worry so much about priority. If they are the same in project, context, and due date, they are not all that different in priority in any way that matters; accordingly, the time worrying about priority is wasted time. That's just me though; YMMV.