For me the key for any team to win La Liga this season is consistency. The title race is still wide open and although Barcelona might be leading at the moment, maintaining their lead won't be an easy task, especially since the points difference is only three points. Both Real Madrid and Atletico Madrid are still strong contenders and with the competition getting more intense, it will be exciting to see who comes out on top at the end of the season.
Consistency is the second option and the most important first option is just strategy and tactics to manage the team perfectly. So if a coach is able to manage players and rotate players perfectly, it will be easier to apply consistency in every match. On the one hand, not only that, but a close relationship between players and coaches must also be maintained to unite chemistry and carry out every strategy with success. And regarding the current La Liga competition, it is not certain who will lead at the top of the standings before one of the teams makes the biggest mistake. But I think Madrid and Barcelona are still very strong candidates for the title holder.