There's a mix 'n match of them. Vitality and Might are not on all of the legendaries. These are the legacies that I am currently using, though I am very seriously considering replacing my Abyssal Settings of Finesse in my Damage Dealer builds with Westemnet Settings of Endings since I don't really need the Finesse or Evasion. Currently I am using some Vitality legacies simply because I am trying hard to get my unbuffed Morale higher. Any Might legacies are just because I figure I'll gain more overall DPS from having an increase to Physical Mastery versus it benefiting a single skill. On my AoE DPS 2H I largely use just Sweeping, Whirling, Vexing, Ttk, Hammer Down, War-chant and Brutal Assault. With my ST PvMP 2H if I do use AoE's they are just Whirling and War-chant, otherwise all single-target skills pretty much.
You asked about bleeds keeping aggro... I wouldn't rely nor even think about bleeds keeping or helping with aggro. My mastery when tanking is only 109k (which will losing at least 8400 more mastery soon). Honestly War-chant, Shield-taunt and Shield-smash are all that I use for mob aggro, with the occasional Sweeping Cut or Whirling Retaliation based on my current rotation cycle.
https://i.imgur.com/dddG0Z5.jpg