I only take Lomotil when I'm having a lot of watery output. That happened with the ileo as well. Usually not more than once or twice a week.
Not drinking liquids with meals helps. Protein + Fat foods are slowest. Simple carbs are fastest. Chocolate = watery output every time. If I'm needing to eat and not go for a while , peanut butter is perfect. I also can eat cheese as I have no lactose problem. Plain cooked turkey or chicken
Too much soluble fiber makes the volume of my output huge and uncomfortable. So applesauce, sweet potato, oatmeal can really bulk me up. But YMMV, some people swear by soluble fiber foods and supplements.
I tend to eat very light early in the day, and my largest meal the minute I get home from work. Not averse to fasting so I can manage a car trip, a round of golf, or a movie.
Try to keep a log of what and when you eat and when you go. So you can figure out the best timing for meals in your daily schedule.
As your pouch stretches and you get better at holding this will all get easier.