It’s a good question and with our probable bowling line up looking like: Amir, Shaheen, Naseem, Imad and Shadab, I would say the best way to manage resources is having Amir bowl outside the power play
2 reasons with the first being that from all the bowlers in the team with maybe the expedition of Imad, Amir is a high IQ cricketer who does not need conditions rather he relies on his skills to do the job. Compared to Shaheen and Naseem who are yet to develop the art of bowling post powerplay and it seems like this is the best way to utilise resources
The second reason is basically what I said at the end of my first point. Our current fast bowlers do not have the skill to ball in the middle overs and honestly with the right guidance and especially having Imad on the other end, both Shaheen and Naseem can be as effective the new ball as Amir