At least with the diamond formation you have the opportunity of rotation but the two in the middle will still tire quickly, and I don’t know how you safely rota

At least with the diamond formation you have the opportunity of rotation but the two in the middle will still tire quickly, and I don’t know how you safely rotate in that configuration. Any beginning serious cyclist can learn to draft. But the pros have got rotating the formation down to a science. You have to go fast without increasing the risk of high speed collision.