| First off, unless they've changed it, you can sneak-spawn so you don't have initial aggro when they pop up (meaning you can then move away and pull one at a time since skeletons don't link). Second, if you kill at least one of them, and the other(s) depop by the time you're done, you don't have to kill them all.
So, sneak-spawn, pull one of the two guardians somewhere safe (i.e. the nearby hallway), smite. At level 71 WHM this should be fairly easy for you, though don't get cocky. (And remember you can still get blood aggro.) If, when it dies, the others are still alive, repeat the process with the other guardian. Try to take long enough on that, that Yum will despawn by the time you're done.
Yum, unlike the guardians, has a few attacks to be concerned with. Such as ancient magic. So if you can let him despawn, it'll make your life easier.
And yes, you can do all that as WHM main, the only part of the quest you have to do as BRD, is start it in Jeuno.  Averter of the Apocalypse~
Unique quests complete: 330-something, keep losing count.
Mission plot lines complete: Windurst, Bastok, San d'Oria, Zilart, Promathia.
Maps not yet obtained: Promyvion-Dem, Promyvion-Mea, Promyvion-Holla, Promyvion-Vahzl, Sacrarium. |