More Crit than RR for me. Settle in, you can only go as fast as you can go, it's either fast enough or it isn't. Focus your mind on marginal gains, is there a side of the road with more shelter (buildings, etc)? Is there a "short" line thru turns?, save a few meters. Savvy breakaway riders leave a little in the tank so they can press if the gap starts to close, a little mind game.