There are 3 types of Ronaldo:
2006-2009 Ronaldo: superior Dribbling, fantastic play maker, one of the best free kick taker in the world --> winger, midfield player
2010-2014 Ronaldo: fast as light, great dribbling, scoring goals in nearly every match --> winger, striker
2016-now Ronaldo: BIG GAME player, mentality superior, the fox in the box --> striker
I think if you want to win the Champions League you need the third form Ronaldo, with Ronaldo's 70 CL goals in 5 years Real has won 4 times the champions League. But the problem is that Real had a worldclass midfield behind him so he didnt need to create chance or to dribble but we lack this midfield player so he cant completely focus on scoring.