Overall you have by far the most chances of winning the CL trophy with more attacking football.
not sure, I see more correlation between money and CL winning.
2016/17 winners Real Madrid, 2nd in revenue
2015/16 winners Real Madrid, 3rd in revenue
2014/15 winners Barcelona, 2nd in revenue
2013/14 winners Real Madrid, 1st in revenue
2012/13 winners Bayern, 3rd in revenue
2011/12 winners Chelsea, 5th in revenue
2010/11 winners Barcelona, 2nd in revenue
2009/10 winners Inter, 9th in revenue
2008/09 winners Barcelona, 2nd in revenue
2007/08 winners ManUtd, 2nd in revenue
you get the idea, I used Deloitte data.
the only two times clubs outside TOP3 richest in the world won the CL - Chelsea and Inter - they were both playing out the back and had a very solid defense. all the other clubs that weren't among richest in the world and played attacking footie didn't win one CL during the past decade. if we want the CL I don't see a better way to win it than what we're doing currently, grow financially and go as far as you can using our strengths.