Progression

The goal of progression in the group game was access to the Theater of Blood. At some point the AA was granted to everybody making the progression generally pointless (unless you intended to raid), but I'm still providing the outline. The missions can be done in any order, just continue with the hails when ready.

Start with Arch Mage Galsin in Arcstone, follow the dialog ("What is the Plane of Music", "What information", and "What new direction") then go to Spirit of Ao the Fourth Born. It gives you three sequential missions:

When you finish these you'll get a Tarnished Chime. Give this to Spirit of Ao and get a Harmonic Chime back, give this to Galsin and follow dialog ("What whispers" and "What complications") to get a Silent Harmonic Chime. This completes the first stage of progression.

The next step is not required by everyone, but someone will need to complete so they can request the group task for the next stage. Head to Devastation and kill high level mobs, particularly the level 73 red-con to 70 mobs. Each of 9 races drop a different Skin, upon looting any of them you get the task Saga Skins. When you finish it (in addition to a spell) you are given the task Preparing Your New Skins. Finish that to be able to request Become the Vessel. This task gives everybody in the group an Enraged Flesh Charm, the key to Razorthorn and required to continue with progression.

With an Enraged Flesh Charm head to Devastation and find Oathmir the Outcast near the zone in. Say "Tell me about the chime", hand him your Silent Harmonic Chime (you'll get it back), then say "I can find out" and complete the task Samples of Corruption. Give Oathmir your Silent Harmonic Chime and get back a Twisted Chime. Give this to Arch Mage Galsin, get a different Twisted Chime back. Lastly say "What solution", this completes the second stage of progression.

The final stage starts with Tak`Valnakor. Complete his three sequential missions:

Once those are complete head to Queen Tak`Yaliz, tell her "What twisted chime", and give her your Twisted Chime in exchange for a Twisted Harmonic Chime. Give this to Galsin to get the final Twisted Harmonic Chime with the clicky port to Theater of Blood.

Access to Deathknell requires you to have completed group progress, including the Enraged Flesh Charm, so do that first.

Speak with Emissary of Druzzil in West Freeport at the zone in to Arcstone. Say "proposition" and "I am interested" to get a Shard of Mana. Next you need to defeat the raid Daosheen the Firstborn.

The person requesting the Daosheen raid required (NOTE: This has changed and you can simply request the raid):

After getting the flag from killing Daosheen go to Shrine of Druzzil Ro in Arcstone, hail it and follow the dialog ("What task", "What enchantment", "What steps", and "I am willing"). The next step is the raid Sullon Zek, Mistress of Rage.

The person requesting the Sullon Zek raid requires:

When Sullon dies go down the trapdoor to the ward, your Shard of Mana should become a Glowing Shard of Mana. Return to the Shrine, follow dialog and give it the Glowing Shard of Mana to get back a Red Shard of Mana, and complete the dialog. Next up is the raid Suchun, the Blood Warden. The only requirements to get the raid are the 3 missions done for Theater of Blood access, which should already be done. Upon completion your Glowing Shard of Mana should become a Black Shard of Mana. If you do this without the Shard you will instead get a Vial of Smoldering Blood.

Go back to Shrine of Druzzil Ro and follow dialog, handing in Shard and/or blood when told to. If you do anything out of order talking with the Shrine should allow you to resynch your progress. Eventually the Shrine will give you a Divine Fetters of Ro and direct you to the Theater of Blood at which point you know your progress is set.

Head to the Theater of Blood and chat with Eodue the Pure near the port up area. Follow the dialog ("What curse" and "What source"), then loot an Inspiration from one of the 6 raid bosses in ToB:

Give the Inspiration to Eodue the Pure and you will be flagged for Deathknell. Events in Deathknell drop backflags for access, but NOT Divine Fetters of Ro which are needed for the final boss.