EFA = Essential Fatty Acids I assume you are saying.
EFA's are very essential not only during a cycle but off cycle. The benefits of EFA's are manifold (cardio, neurological, cholesterol + other health benefits). Furthermore, managing ones cholesterol levels is a long term endeavor. The key to stay healthy year around and only taking EFA's during cycle IMO is not sufficient.
I take Fish Oil and Flax year around. It is dirt cheap and easy to take.