As the title says, the top displayed vengeance parse for heroic Imonar is actually a havoc demon hunter.
https://www.warcraftlogs.com/rankings/17#boss=2082&difficulty=4&class=DemonHunter&spec=Vengeance
https://www.warcraftlogs.com/reports/WJ2Ty4PbA6nRxpqF#fight=5&type=damage-done&source=24