Since the benefits you’re seeking are weight loss AND performance, I’d recommend trying intermittent fasting. If you’re doing TR plans then that means you’re only going to be doing 1 fast every 6 weeks, unless you start having a knock-on effect on your training.
The key thing about this and other eating habits is they need to become a regular routine rather a diet. It needs to be a lifestyle. For me personally, I found that intermittent fasting, since I did it every day, was a lifestyle that was easy to adopt, whereas doing something once a week is much harder to maintain consistently over months and years.
The one thing I’ve learnt through experimentation is that general good, healthy habits that create a small but consistent calorie defecit are much easier to stick to and therefore more likely to be successful than other more faddy approaches such as fasting or strict diets.