When I took the DAT, line counting did not help whatsoever. Pretty much all of the options had the same number of lines. What differentiated them was whether or not certain lines were solid or dashed. Visualization is your best bet. The more practice problems you do, the better at visualizing you'll be. The first month of practicing TFE, I could not visualize the answer at all. I kept reviewing the correct answers, though, and this really helped me to see what they were asking for. 🙂