If the board mix is good you should use that as a base and only blend in enough of the (delayed) mics to create a live feel (if there is a full PA mix that is)
I would think that a spaced omni setup would not work very good, unless outdoors, or in a very well damped room.
You could try running your VP88 in M/S mode and get an external M/S matrix. This would enable you to control te stereo width during recording.
+1 on this. Being an MS microphone I suspect you are getting a little too much width on the wide setting, running it in MS mode to the recorder and using an external matrix "should" help. One thing to bear in mind with MS microphones, is that because of the way the capsules are orientated, in spite of all the technical descriptions telling you that in equal amounts they are providing you with a cross pair of hypercardoids, they don't actually sound like that. MS stends to give you a good facsimile of the "sound" of the room, crossed pairs tend not too.
All that being said, if you still can't get what you are looking for, a crossed pair might be a better solution, giving you a more "front" sound.
