Ancelotti must see this fact as a problem that must be resolved immediately considering Real Madrid will soon play in El Clasico. Barcelona as one of the most prolific teams in La Liga could embarrass Real Madrid if their attackers can't score more than one goal in every game.
Real Madrid must not rely too much on Benzema when scoring goals, they must take the slightest opportunity without having to pass the ball to Benzema feet. El Clasico match is very important for Real Madrid to regain control of the first position in the standings, because currently Real Madrid and Barcelona have the same number of points in the standings list.
Their record is the same, one series of seven wins. But this week they are busy preparing for UCL. Barcelona are struggling in their UCL lost two times in three match. I think right now Barcelona's focus is on the UCL. They try to take three points in every match. As for Real Madrid, they are better at UCL. Madrid's chances of qualifying are very open. I think the El clasico issue they'll think about after UCL later. I don't know yet if Benzema will play at El Clasicco later, but I'm hear if De jong and Kounde ready to go against Madrid.
The work of Barcelona will be even greater before they play an el clasico match. This is because their chances are slim if they are not able to beat Inter Milan. Victory is the only way if they still want to play in the Champions League this season. While Real Madrid will be easier, I consider this to be a strengthening of their game before El Clasico later.
Real Madrid must prepare well because they have the advantage of a tough Barcelona game in the Champions League. They have to see it as an opportunity for them.