User blog comment:Alartan/Swiftness or Mobility boots?/@comment-4843720-20150202011710/@comment-4022742-20150206080358

Well actually, getting swiftness would be better, it helps Sejuanni stick to the target better. Mobility just looses too much speed for her when she has hit her target. Even though her slow is massive it's not enough to make up for the loss in speed, especially if the opponent has an escape.