Uh, you just read what I said, right? You are not going to run Offensive options on a SubSeed set with Whimiscott. Just use the spread given on the analysis as it focuses on keeping Whimiscott alive, which is further bolstered by SubSeed, as the goal is to annoy the opponent by staying alive with Leech Seed draining their HP. But wait, what's this? There's already an option to make a SubSeed set on the analysis. By picking Substitute over U-turn. But when using Whimiscott, remember that is one of the most difficult pokemon to use, due to it relying on prediction so heavily. Just saying.
okay, and i didnt mean mixed attack, i meant mixed defense