The theory (I don't feel like binging the articles) is that the #3 hitter comes up the most amount of times with 2 outs and no runner on than any other person in the order making it a less valuable position. You should want your best hitters hitting 1, 2, 4 and 5 I believe. 2 will also have more PA's in the year than the #4 hitter. If we believe Duran will be right in front of Devers at 1 and have a decent OBP, having Devers right after him isn't a bad idea. I'd want my best hitters getting as many PA's in the season as possible.