Its not verry hard to get exhalted with the argent dawn
some tips:
1. Start doing the AD quest at Revered, for some already to late
This because you get mob rep till this level
2. Collect as many stones you can turn them in but dont use the AD Tokens untill you are revered
3. Grind sometimes at The Noxious Glades (invader stones) 10x for 1 token
4. Scholo runs are the best if youre lucky you can collect some Healthy dragon scales, Stratholme other hand gives easy boss rep.
Sinds last Patch Strat contains new boss in the verry beginning of the back entrance that drops 2x Corruptor stones Reset and go again
The faster way i used was to do a shitload of scholo runs and hope for the dreadmist mask which never drops (dropped for me only one time after 44 runs and never dropped again)
The 2x corruptor stone dropping boss moved out of Strat when the invasion ended I believe, this was sort of a one time deal.
And besides, you can only enter the same dungeon three times a day.
Isn't it 3 times per hour?
I thought It was per day. Not 100% sure though.
It's 5 times per hour.
We did it on the horde side farming dragonscales for Ony key quest.