Aggressive is the way if one has the time or other less risky investments elsewhere. Interestingly, they have an option that keeps one 100% aggressive until age 45 and then shifts 2% a year into income (bonds) to give that 60/40 split at the retirement age of 65. Good for the set and forgetters.
I might be on that one! 😅
That particular strategy is called UniSteps, and they handle it automatically. It's probably decent for someone with no significant investments outside of their KiwiSaver and who doesn't want to think much. So, could copy it manually.