Those lists are really filter-applied shortcuts to view a specific set of profiles on the ranking-up pipeline (specifically, those mid-to-high ranks that have the necessary activity, but lack under 20% merits to reach their next rank).

All those lists, nevertheless, allow you to modify the filters, and retrieve different subsets, in accordance to:
-   Rank (choose 1 or n ranks)
-   Segment_merit: broken down into 20% quinties.
-   Segment_activity: broken down into 20% quinties.
-   Segment: Rank + lacking merit and/or activity (without going into the quintiles).

For example:
Hero members with segment_merit > 100% (regardless of activity):
https://public.tableau.com/shared/FXW8GKT3G?:display_count=y&:origin=viz_share_link

Hero members with segment_merit > 100% and Activity [80%..100):
https://public.tableau.com/shared/CY39T2S33?:display_count=y&:origin=viz_share_link

Hero members within 20% of merit and 20% of Activity of reaching Legendary (your suggested list, but for Heroes):
https://public.tableau.com/shared/7BJR6S2CP?:display_count=y&:origin=viz_share_link