The area south of Andorhal is full of skeletons and zombies that are relatively easy to solo for all classes. Whats better, they drop Major Healing potions. Handy if youre a melee character. Furthermore, you can start working on your Argent Dawn faction here and get yourself up to a point where they vendor at Chillwind Camp will sell you Enriched Manna Biscuits, these are one of the best sources of mana regeneration in the game. A nice addition to buy 2moons dil.
You can go from 50-53 here if youre in the mood, if youre not good at taking even level mobs fast then another good spot is Tanaris where there is still a ton of 46-49 mobs floating around the South West part of the zone.