you are athletes, not bodybuilders. You absolutely need carbs, in the form of fruits, vegetables and whole grains/pulses, beans. NOT whole grain bread, pasta etc...but quinoa, millet, amaranth etc...lentils, barley, beans...
We had a guy fight last month, took him down 10lbs and back up 13 by fight time. He ate fruit, a ton of veg, small amounts of brown rice, quinoa, yam, beans and a little bit of salmon or chicken 1-2x day. Won easily, even had a green whole food smoothie and water the morning of weigh in. Was never hungry except just before weigh ins.