The dark union event has ended. Here's some data:
highscore expert 1, rank 1134
highscore ultimate 1, rank 797
highscore pp 1186, rank 5732
highscore pp 1841, rank 5689
highscore pp 2511, rank 5578
highscore pp 4210, rank 5266
highscore pp 10749, rank 4886
highscore pp 4836026, rank 1008