zone mic a thrust stage?

The play: wizard of oz

The thrust stage extends well into the audience with the audience on all 4
sides. connected to the main stage by a runway.

The client demands double 15 main speakers  for the "look". They also want
only
"floor mics" (boundary effect) and some wireless lavs.

The Orchestra will be located to one side between thrust stage and main
stage.

My first thought was having a delay zone after the thrust stage, however
it
then occurred that the delay (to the actors ears)  and the difference
between originating sound and amplified sound to the audience would be
excessive when the
action was occurring on the thrust stage.

Anyone run in to this kind of situation and have any special insights?