If I would have to chose the finalist would be Liverpool - Real as I don't want to see another british UCL finals ...as this is not enjoyable for neutral fans of competition.
Just look at the history of their matches in the champions league especially when playing away Liverpool always dominate and win it means they are always ready based on mental, even if Liverpool lose no more than one goal.
I think it is not going to be a bad decision at all to give some players a little bit of rest because obviously, they need to concentrate on the English Premier League, and also the upcoming final of the Champions League after they beat Villarreal in the second leg.
Considering the previous performance of Liverpool in Champions League matches they play really well in away conditions. So, I think it is not going to be a big problem for them to qualify for the finals after the advantage that they already have from the first leg. The question is which team they will be facing in the finals.