All credits gos to Adder

After spending hours of harvesting reputation to get to Exalted I thought I would share my experiences and what I consider the best way to get to exalted. The first thing I will recommend is never turning in Scourgestones or use Argent Dawn Valor Tokens until you are more than 50% through Revered. The best way to get reputation is at follows:

Neutral through to Friendly (50%)
Kill any undead mob within the WPL and EPL area.

Friendly (50%) through to Honoured (50%)
Kill any elite undead mob in WPL, EPL or in the instances.

Honoured (50%) through to Revered (50%)
Kill undead bosses.

Revered (50%) to Exalted
Turn in Sourgestones, cleanse the cauldron and Healthy Scales.


EXPLANATION OF HOW

Cleansing the Cauldron
To cleanse the cauldron you have to have completed all parts of the 'Target:' quests given out by High Priestess MacDonnell in Chillwind Camp.
Using your Vitreous Focuser collect Ectoplasmic Resonators off the corpses of the undead around 'Gahrron's Withering Cauldron'. The reason why you cleanse 'Gahrron's Cauldron' over and over again is because it has a higher reputation reward. You will also be collecting scourgestones but please keep these till you are pasted 1/2 through Revered with the Dawn. Once you collect 4x Ectoplasmic Resonators, 4x Runecloth go to Alchemist Arbingto in Chillwind Camp and buy 1x Arcane Quickener. Then go back to the cauldron and use it. Doing this will give the player 25 (27-28 if Human) reputation points with the Argent Dawn. I would collect around 80x Ectoplasmic Resonators at a time and cleanse the cauldron twenty times. This quest can be done over and over again. However the 'Arcane Quickeners' cost money, 45 silver. The runecloth is picked up off the corpses of the undead mobs, and you usually have more than you need.

Using only the Cauldron quest to gain reputation from Revered (50%) to Exalted you will need all of the following:

1680x Ectoplasmic Resonators
1680x Runecloth
420x Arcane Quickener (Total cost: 189 gold (PvP Rank 3: 168 gold))


Scourgestones
Most undead mobs in WPL, EPL and the instances drop Scourge Stones of some kind. Collect these stones and put them in your bank. They will stack to 250 so you shouldn't run out of space. As the reputation gains become harder after you get passed 50% in Revered I would keep them to use then. You will get 25 (27-28 if Human) points of reputation for each turn in of 20x Minion's Scourgestones, 10x Invader's Scourgestones, and 1x Corruptor's Scourgestones. However, the Argent Dawn quests at Revered and Exalted require some tokens (Revered: 10, Exalted: 25) so you will have to spend some for those quests. Once you turn in the stones you might as well use the tokens to gain addition reputation.

Amounts of ScourgeStones needed to get to Exalted from Revered (50%):

Minion's Scourgestones: 4200*
Invader's Scourgestones: 2100*
Corruptor's Scourgestones: 210*

*These figures include spending the Valour Token reward from turning in the stones.


Healthy Dragon Scales
This quest is from picking up Healthy Dragon Scales from within Scholomance off of Plagued Hatchlings and returning them to Betina Bigglezink at Lighthopes Chappel in EPL. Each scale is a quest itself, start the quest and then talk to Betina Bigglezink. You can carry as many of these scales as you can. The drop rate of these scales is low as the prereg quest is Plagued Hatchlings and that isn't done by many people. Each scale gives the player 50 (55 for Humans) reputation points with the Argent Dawn.

Total number of scales needed from Revered (50%) to Exalted: 210

Since the 1.11 patch there are more options for getting to exalted.

Turning in the repeatable quests for the different collectiable items:

For insignia of the crusade turn-ins:
crypt fiend parts
bone fragments

For insignia of the dawn turn-ins:
savage frond
cores of elements
dark iron scraps

gets you 10 rep with AD each turn-in of 30.

At Revered, turning in 7 each of the insignias of the dawn and crusade
will get you one of the superior armaments of the dawn (I would take the 18 slot bag) You also get 100 ad rep. for first turn in.
So, not only do you get an 18 slot bag, but you get 380 ad rep total with it.

You can repeat this 6 times for each of the unique items, for a total AD rep
of 2280

The epic line takes 45 insignias of each to turn in for an item. If you turn in all 6 of those, you get 5400 AD rep.

So, for 9360 bone/crypt items (and 9360 of the others), you can get 7680 AD rep, a nice bag, and some shardable stuff.