Keep in mind, if your Lion is eating 2 days per week that is plenty. Very often they will "hold out" for live food by ignoring dried offerings. The aquarist thinks they won't accept dried, when in actuality they just aren't ready to feed yet, until the live food triggers a feeding response. Be patient and allow a good 5 to 7 days of attempting dry foods before you go to the ghost shrimp. You need the dry food for the proper nutritional value long term.
You are right by the way, that is an awesome fish!