At this time of Benzema's career it will be difficult to completely rely on him to carry the team because he is aged and obviously becoming prone to injuries, the best move for Ancelloti now is to find a suitable replacement for Benzema in the summer since the transfer window is already closed. There are still so many options in the market in that position, Real Madrid could try making a deal for Victor Osimhen in the summer.
I don't think Benzema time in Real Madrid will exceed this season and the star player will be book to sign on to another clubs that will give him less pressure, but at this stage, real Madrid may over worked Benzema and overly stress him beyond his aga capacity due to the quest of Real Madrid to create and maintain their record which have exposed Benzema to frequent injuries.