I'm a 4 and I mess around all the time in my crits. I just try everything I can. See how a field reacts. I break away, take long pulls, sit in. My results vary but ive won on sprint finishes and solo breakaways. It doesnt happen often but I enjoy interesting racing much more than super calculated racing. Its good to learn how a charging field reacts at different times in a race under different circumstances. I will save the super tactics and full race sit-in-wait-for-sprint-finish for when if ever I become a 2.