Tri - Wire with Bi - Wire: Which to Bridge?

I have speakers (Mirage OMD 28's) which have tri-wire binding posts, but my speaker cables are NBS bi-wire.  I also have a set of Synergistic Research jumpers.  Question:  Which posts should I feed with the bi-wire off the amp, and which should be jumpered?  The Synergistic guy told me to jumper from mids to lows, with the amp wire directly feeding highs and mids.  I thought that was a strange suggestion.  What say you?