Pacing strategy comes more into play for individual TT events.
If your racing others for results you will usually have to throw power and HR strategies out the window at some point in every race.
Not many people win against even competition without going into the red for extended periods when others are no longer willing to.
Matt Fitzgeralds book “How Bad Do You Want It?” might be worth a read. I believe its on Coach Chads reading list for good reason. I certainly found some useful insights and strategies in it.