High rep low weight to get shredded?
The idea of doing many repetitions per set with lighter weights is all about not getting injured. When you are in a calorie deficit most people think that they will be exhausted easily and may hurt themselves with heavier loads. But as long as you stick to your form, choose the right weight for 8-12 rep range and consume proper nutrition, the risk of injury is not higher. In fact, if you just do a high rep, low weight routine while cutting, because your muscles are not stimulated with enough intensity while eating less, you will be prone to muscle loss.
So while dieting to lose fat, start your lifting days with a compound lift with low reps choosing a weight that will be challenging. You can finish the day with smaller weights and higher repetitions to increase calorie expenditure but never forget that WEIGHTS ARE THERE TO STIMULATE NOT TO ANNIHILATE.