Working on the MV version,
I went into Tileset Configuration, and changed Tag 1 to only affect battlers on the "same (1)" layer, which is a majority of the characters.

Then I went into Actor Configurations and changed Actor 1's TBS Layer to Above (2).

In the example below, we have Actor 1 set to Above (2), and the affected tile area set to same (1)

So I had Actor 1 "fly" over the other Actors to reach the affected area...


"battler is not defined"... I don't know if there's a setting I'm overlooking that can fix this problem or not.