I use "total delay" if Lamborne is full and I have to hold an aircraft at Braso or Saber.
Tactically you should only go around the outer holds once or twice, so if I give "total delay 20 mins" it means the hold at Braso + holding time at Lam, and it saves time saying "Hold Braso for about 5 mins then expect to hold Lam for about 15mins....!"