#3 Karim Benzema (£9.5 million) - Real Madrid

Benzema scored in last year's semis versus Bayern and added a goal in the final versus Liverpool. He scored 5 goals overall in the 2017/18 UCL. As Cristiano Ronaldo has left Real Madrid this year, his role would be too crucial for Los Blancos this season.
In the current La Liga season, he has already scored 4 goals in 4 matches. His form is looking quite good. As he is available at £9.5m only, many fantasy managers would have already roped him in their squad.
#2 Lionel Messi (£11.5 million) - Barcelona

Lionel Messi, the Argentine legend needs to have a grand performance in the upcoming UCL. He is in amazing form this season, having already scored 4 goals and 2 assists in 4 La Liga games. He, along with Luis Suarez are the pillars of Barcelona. The duo can break any defensive line in the world.
Last year, he scored 6 goals and provided 2 assists in the UCL. This year, many fantasy managers eyes would be on him, as always. As Barcelona's first match would be against PSV managers might expect a lot of points from him this season as well.