Adversarial Blood is a terribly designed quest. In all of WoW, only the Silithus Field Duty quests are worse.
Basically, it's a group quest where you need to summon and kill 4 bosses, and loot a quest item off each boss. This is the sequence of stuff that you need to do:
1. Kill living arakkoa until you get 6 Shadow Dust (25% drop rate).
2. Use the Shadow Dust to get a potion that lets you see invisible dead arakkoa for 15 minutes.
3. Kill dead arakkoa until you get 10 Time-Lost Scrolls (~50% drop rate). These arakkoa are actually pretty tough, and you'll have to deal with the living arakkoa at the same time.
4. Use 10 Scrolls to summon a boss.
5. Repeat 4 times.
This isn't all that bad, especially if you're in a group.
Until you realize that the boss only drops one quest item for the entire group, and you have repeat the above process for each person. This is insane.
As a general rule of thumb, if you have a Group quest to kill a boss, you should let the group complete it together. This way, everyone gets the quests together, works together, completes them together, and is rewarded together. Shared accomplishment is the key.
Quests where you have to repeat the quest for each person in the group are not fun!
Heck, the only reason the Silithus quests are worse is that you couldn't set it up so that everyone was at least on the same quest. Instead, half the group would be working on a quest that they did not have.
Group quests are all well and good, but you need to be able to work on and finish them as a group!