Lol, not counting what happened before 2011 but counting 2014-2016 (the worst period of Nadal's career) is just peak level cherry picking.Nadal fans are more attached to the mystique (Chatrier, Clay God, etc.) than to the tennis presented by their idol.
Nadal has 17/7 in clay. But it started with insane 9/0. Between 2006 and 2009 there were 9 games and 9 wins for Nadal. Between 2011 and 2019 Nadal leads by 8/7, something very close.
Nadal has not been much superior to Djokovic on clay in recent years. He's better, but not much better than before. And this year the weather conditions are different.
Djokovic tends to get complicated against very offensive players, who if they are on a good day can pinch the lines all the time, serve insanely. This is not the case with Nadal.
I believe Nole will win 3-1.