The quest itself has only one stated step: "I need to gather the symbols that Ritnoc told me about and take them to him." You will not receive quest journal updates for the four symbols you must loot. Main Quest update items (symbols) are from Ornate Chests which will only drop from aggro mobs. All four symbols must go to that single individual. Lockout is 3 days 15 hours on success.
Only one person will be able to complete this quest per entrance.
Strategy note: Using the Eye on this Effigy will cause trash mobs in the area to despawn; if you have the eye you may consider training to the NPC and activating it to remove the enemies from the area. Do pull Ireth the Cold off of his perch and down to the floor where you're at or you may be unable to loot his corpse for the needed drop and have to wait until zone reset to try it again.
Strategy note: Using the Eye on this Effigy will cause trash mobs in the area to despawn; if you have the eye you may consider training to the NPC and activating it to remove the enemies from the area.
Strategy note: Any toon or pet that is in range of Sharti will spawn two ^^ (heroic) adds; the dragon does have a knockback. You are encouraged to remove melee pets, set mage pets to maximum distance, have the MT melee, and all others possible range attack. An MA may consider assisting the MT by off-ranking adds, or a chanter may consider mezzing the adds until the dragon is down. (The adds will still need to be killed.) Additionally, you may be able to burn the named rapidly enough to avoid complications from the adds with significant fabled and mastered set-ups. As with Ireth, Sharti will spawn on a perch that is for many too high to reach to loot the corpse. Make sure you pull down to same floor level prior to killing. Found that using a sub-10 lvl bow works pretty well for that purpose. A long range agro spell should work as well. Nothing worse that having a dead mob with a body lootdrop where you can't get close enough to loot.