FYI, Not necessary to tri-wire. Bi-wire (split tweeter and mid-bass) will give the most benefit. Then use a quality jumper from midrange post to bass post.
Another alternative is using a single wire to start (and jumpers to the other posts). If this doesn't satisfy, add another run and see if things improve.
Another alternative is using a single wire to start (and jumpers to the other posts). If this doesn't satisfy, add another run and see if things improve.