In the crucible Bladedancer remains my best subclass. I go invisible and stalk my prey.. Not a hard rush. Hard to stop the element of surprise. Flux grenades to stick opponents. Armor and Agility. My favorite subclass might be the Defender Titan. Suppression grenades can really stop a team close together allows teammate to rush.. The bubble is obviously key in any PvE activity but can also be a game changer in the crucible.