I looked at that, but it doesn't cover this issue. Take the Aquila Kill Team. Must take 1 unit of Veterans, who must number between 5 and 9. It must also take at least 1 of Librarian (1 in the unit), Termintors (1-5 in the unit), Vanguard Vets (1 to 5 in the unit) or Bikers (1 to 5 in the unit), but can take some of each of those. It can contain a maximum of 10 models. So, adding 4 Vanguard vets needs to reduce Bikers and Terminators to a max of 1 each. Adding 5 Vanguard Vets would reduce Librarians, Bikers and Termies to 0 each.