The Foresight of Seer quest is mostly done in the Citadel of the Worldslayer, and is a perquisite for entry into Deepscar's Den. The quest name is not mentioned in the game anywhere that I could see (it does not get entered into the Quest Journal), its only found in the wiki. There is nothing that I found in-game that gave me an understandable clue about what to do or how to complete it. However, be aware that I am terrible at these kinds of puzzles.
Begin by grouping up (if you need more than one toon) and zoning into CotW. This chat/assignment process is much like what is needed for zoning in to The Ascent...an four hour instance is created, and the only toons allowed in that instance are the toons that were in your group at the time of instance creation. You and the other toons can leave the zone and come back, as long as it has not expired. If you mess things up, you can close that instance and create a new one, but all zone-oriented progress is lost. You'll have to fight trash (or whatever) all over again.
The goal is to loot the four Foresights, as explained below.
I highly recommend that you clear the areas around each mini-boss before you start any fight. The trash in CotW seem to be rather...efficient...at causing damage when they are behind your tank.
When you zone in, there will be a Ghillie nearby in the next room. Do her chat and she will disappear and spawn Kraxt in the Trophy Room. Kraxt is rooted, has no adds, does Flurries and Wild Rampages, and casts Feranic Grasp. He also warps toons and pets to the front of him even though they are already on top of him during the fight. I don't know if this is a part of Feranic Grasp. He drops Foresight of Conquest (item 122917) and Potion of Conquest (item 9874).
Killing Kraxt will spawn Uzur in the Observatory Room. Uzur is also rooted, has no adds and Rampages. Killing Uzur will spawn a Ghillie in the Livi event area. She drops Foresight of Dominion (item 122921) and Potion of Dominion (item 9875).
Chatting Ghillie to spawn Livi is easy, but failing the event can be easy too. Any toon can chat Ghillie, but once started, that toon has to stay there and complete the chat sequence. For sure, moving your toon away from Ghillie during the chat process will fail the event and force your group to zone out, close the zone, and start over again. I believe not having the whole group in the vicinity will also fail the event, as well as having a groupie die before engaging Livi or an add. But those are just my guesses. There are so many possible flags that it can be difficult to guess exactly what triggers things.
If the event does not fail, then Ghillie (after chatting) will advance slowly towards Livi and attack. Three "a blighted Vitrik evoker" will spawn in the hallway and advance towards your toons. Ghillie and the spawns will ignore each other. At some point another wave of adds will appear, this time four "a blighted Vitrik evoker" and a Livi's Elite Creation. The spawn and advance the same as the first wave. Livi herself is rooted. Sometimes she will warp the tank to her. I don't know what triggers this. She drops Foresight of Blight (item 12995) and Potion of Blight (item 9877).
When I do this event, I try to arrange Ghillie herself to kill Livi by focusing my guys on the adds. Ghillie always had Livi dead before I killed all the adds. Usually, when one npc kills another, the corpse despawns right away but this does not happen in this event...Livi's corpse stays lootable for the usual amount of time.
When Livi dies, you then chat Ghillie which spawns Zuru. Zuru is not rooted, does Enrage, casts Will of Zuru and has three adds which appear one by one: two "a discordant ukun savage" and A Discordant Huvul Ravager. He drops Foresight of Discord (item 122929) and Potion of Discord (item 9876).
At this point, you will have all four Foresight items and so can zone out to the Vale. Continuing on by chatting Ghillie and killing Bixt is not required for this quest but I'm pretty sure it IS required for zone completion. CotW completion is a requirement for entering Deepscar`s Den.
After zoning to the Vale, hand in all four Foresights to Ghillie. This will get you her Foresight of Farseer chat. And thats it.