I plan to make a full post detailing all of Luna's guaranteed followups later but I wanted to go ahead and put this tech out there. This is only ever useful if Luna's Slam meter fills up mid-combo and she wants to quickly reset to neutral to start her Slam (the shine when her meter fills up often interrupts her combos and leads to getting punished). Flying Frog to souper grab is still 20% more damage in every other case, but can result in a dropped combo if Luna's Slam meter fills up, which can lead to her Slam being stuffed or the opponent getting free damage.
The tech is that Luna's Ogremented Jab 2 can be cancelled with shield, allowing for an immediate followup into an aerial out of shield. The inputs would look something like: A -> A+B -> R(hold) -> B or A.