Its mainly your diet, and some cardio. Low reps, high reps, its all the same in my opinion, just dont burn yourself out. Cutting, you just have to burn more calories than your taking in, put yourself in a deficit, keep your protein high to maintain muscle and your good to go.
Also low carbs really helped me out, I would suggest only taking in carbs for breakfast, such as oats without added sugar, and before/after workout.