I would skip Tok, not much there and the drive from Delta Junction is straight and not what would be listed scenic. Tok cutoff is a pleasant drive but with your time limit I would give it a pass till you do the Alaska Highway. The Richardson is the scenic route to Glennallen and Valdez
Fairbanks is worth a couple days. The Riverboat Discovery, Museum of the North, Pioneer Park, Chena River Walk. Then there is the pipeline view area north of town and few miles farther is Fox with the Turtle Club or my wife's favorite Silver Gulch Restaurant and Brewery.
If you haven't been to Valdez it would be worth great little museum and it's free. Hike up to Worthington Glacier, and if time allows McCarthy and the Kennacott Copper mine.
Enjoy your trip