Book Premiere Pass or Multipass First?

Hi all, going during spring break (first week of April) and decided to get premier pass for magic kingdom and multipass for Hollywood studios and Epcot. We check into the Disney resort on 4/1.

Our Hollywood studios days is 4/4 (fourth day from check in), Epcot 4/6 (sixth day from check in) and Magic Kingdom 4/8 (eighth day from check in).

Should I book the lightning lane multi passes first or book the premier pass first once my booking window opens 7 days out from check in? Would premier pass sell out (it would be 14 days out since my booking window would open 3/25) if I booked it last?