At this time of year (short days) I would recomend starting early, and heading up Macomb via the slide, then work your way over to Dix, heading down back toward the Elk Lake Parking lot.
The reason for this, is that you may be in the dark on your return, and last 5 miles or so, is easy to follow in the dark. If you do it in the other direction, two hours from the end, will leave you on Macomb's summit. If you want to head to route 73, this trail is more difficult to follow in the dark, especially in the fall. There are a lot of hardwoods, and the leaves hide the path somewhat.