Most of the monsters can be got out of the way of the bosses by giving two Tukang's Wine to the Old Swordsman at the entrance. Mister Tso in West Archosaur gives them for 15 Lumber Essences, 15 High Alloy Steel, 15 Granite, and 15 Extruded Charcoal each.
Bosses are encountered in this order:
All three bosses drop skill books and Molds for crafting gear at the cauldrons near the General in Archosaur.
After players complete the BH and go to the Sage NPC to complete the Cultivation, they will probably need to relog before they can use skill books.
The Goblin creatures here, if not others, have been seen to switch targets in what may be an unusual way: if a "puller" character runs ahead and aggroes them by proximity alone, without doing any damage, and another character passes very close to them, say three feet or so, they may switch their aggro to the closer character.
The Death Knight type enemies do fairly high amounts of AE damage.