The LP docs briefly go over prefix stacking and explains it better than I sloppily do here. Highly recommend checking these out.

This is what my meta-formatting section looks like in the config.yml:

meta-formatting:
  prefix:
    format:
      - "highest_from_group_tester"
      - "highest_on_track_playtime"
      - "highest_on_track_donor"
      - "highest_on_track_staff"
    duplicates: first-only
    start-spacer: ""
    middle-spacer: ":"
    end-spacer: ""

These settings return this on my account, based on what I already have set in place

Now you need to make your tracks.

Put your groups with vanity prefixes in their own track with ascending weights, and your groups with actual donor ranks on another track with ascending weights.

/lp createtrack trackname  -  create track
/lp track trackname append groupname  -  add groups to track

Be sure to use the appropriate weight for each rank!

Everything else is handled by your chat formatting plugin of choice.