Check out Skrax Swifttail's Faction Guide
http://samanna.net/gen.info/faction.shtml
The quest to improve CoT and CoT Ill faction probably requires some Erudin faction-work as you are a dark elf. Here is a cut and paste from the link above:
"...At this point, get a port to Toxx, no druids in that circle to KOS you and carefully make your way north towards Erud. When you get to where you can see the path to the Erud Zone do not get to close to the guards or they will kill you. Make your way west to the first Merchant Hut within sight of the entrance to Erud. In the hut is a merchant named Emil, sneak behind him and give him the Wooden Shards (give him 4 at a time.) After about 390 I topped out my Merchant Faction (BIG NOTE: Bankers = Merchant faction), but it took another 640 or so to top out my Erud High Council Faction. (I actually did this quest much later on, so I was already maxed faction with the Guards, but this quest fits perfectly right here.) I just gave a new player the remaining wooden shards and let them benefit from turning them in. On a side note there is an Erudite in South Qeynos (Danaria Hollin) that will be a real nuisance and attack you (she will try to charm you). She is either on the Merchant faction or the HighCouncil faction.
Okay, once you have maxed those 3 factions, head west until you hit the water and then head south following the beach until you hit a dock. By the dock in Toxxulia spawns a Heretic by the name of Elial Brook. He is a five-minute spawn and I killed him 75 times. He gives faction with the guards, the three mage type guilds of Erud, and the Deepwater Kights (one of the two Paladin/Cleric Guilds in Erud). He will lower your faction with the Heretics though.
He gives great faction hits (Killing him once is like gaining 20 faction hits). I was amiable to the 3 mage type guilds in Erud from killing him alone. Erud is easy to maneuver in, there will be some KOS people, but they are stationary not wanderers like in Qeynos. You can easily avoid them or run by them to the teleporters, they will aggro, but not follow. Get yourself into the palace, you should have nobody KOS to you except one High-Elf Enchanter in the Enchanters Guild (She is on the High -Elf Enchanters faction, not the Erudite Enchanters faction). On the third floor of the palace is Toresian Fhabe. Set up a hotkey that says "I wish to aid Toresian" and he will give you an Inert Potion. Bring that Potion to the Vials of Vitality, on the first floor of the castle, and give it to Slansin.
You will get faction with Coalition of Trade Folk Ill, Coalition of Tradefolk, Carson McCabe, Corrupt Qeynos Guards and The Freeport Militia and no minuses, like the scalp quest in HighPassHold. This is your chance to increase your faction with the corrupt Qeynos guards as well as the rogues of Freeport. This is also your best chance to raise your faction with the merchants of Freeport. "