20-29 I suggest you hit up Echo Caverns. Your target, Needlites.
The one spell that is necessary here is Banshee Aura. You will be meleeing with your pet.
When you get in to the needlite room run to the left, make sure you are invised. In the bottom left corner is where you will be pulling. Their are 7 mobs in this room. 3 on the left and 3 on the right. The 3 on the left you can pull with out fear of adds. The one on the right you can pull too with out adds but there are two in the back that will add if you pull them. Leave them alone until you hit 24, FD pulling doesnt work because they are very very fast mobs and Jober is an idiot.
When you get here buff up with Spirit Armor, Sheilding, and Banshee Aura. Give pet Focus Death and Spirit Armor.
Pull the one closest to you with Darkness, occasionally they will resist, just send in Jober and re apply the darkness. When they are darknessed run at them so that your pet gets agro on them from you getting hit. Melee then until about 50% and back off and Life Tap them once or twice. Your Damage shield eats these guys up. They hit REALLY fast but don't hit for more then 20 and occasionly hit for their max. This is a great camp for Defensive Upgrades. Make sure you re apply darkness as their pathing takes them right into the Wormspore trap.
These guys are on a 15 minute timer if I remember correctly and when you clear the camp you will have plenty of time to med until the next one spawns. At 24 attempt the back two by mezzing one with Screaming Terror, the other will come at you. By the time you kill the first mob the second one will be un mezzed, just kill it.
Great exp here and easy too. Loot is Needlite Wings and Legs, they are uncommon and sell for 2pp 5gp a piece. Occasionally a Needlite Queen will spawn, she drops a Giant Needlite Wing and sometimes a dagger. I don't know how much they sell for because I used them on my Necro(heh I sucked). I would usually get a stack of legs and wings before I would leave for one reason or another.
At 29 I agro kited in OT. Great exp but loot is boring and goons suck(if you're an ikky like my self). Just be careful of goons here. If your mob suddenly drops from 70% to 50% you just FD. If a goon walks up on you while medding send in your pet and FD, he should be able to take two or 3 hits before biting the dust. This is great exp but there are other options. I stayed here until 34 because I got bored.
At 34 I suggest you do the Druids at the druid portal in Western Commonlands, about 2% a kill at 34 and 1-2% a kill at 35+. Sure this may seem trivial but the loot is great. Every druid drops up to 5pp, up to two fine steel weapons, and a long bow that sells for 2pp and some times a gem. I made 400pp in one yellow of exp while I was here. Here's how you do it.
At the druid ring there are 2 druids that you will be fighting, they con blue and are only doable at 34. There is a 3rd druid but she is indifferent to an iksar and cons red, don't mess with her and she won't mess with you, she is a great place to drop off your loot.
Alright, you're going to want to split them. Cast invoke fear on one and it will go running off at Sow speed. Darkness the other and send in pet, then Fear it and nuke it down with Shock of Poison and Life Taps. Usually takes about three or four nukes to bring it to 20. Just remember to keep the male feared because he heals and is very annoying. Take them down fast because the damage sheild can eat up your pet. When you get the mob dead run back to top of hill and FD. Your fear should be wearing off right when you FD. Wait for the druid to come back to the spawn spot and get out of FD and med for 1 minute. Then do the same you did for the other and congratulations, you just split the camp. You will make killer loot and get decent exp until 38 if you wish.
Another option at 34 is Gunthak, about 2% exp a kill until 40 and easy stuff. Go to where the mob for the Temperance Quest is and pull there. If she is not up just keep killing here until she spawns. Once she does you have a large safe area. Pull with Darkness, cast hungry earth, Eternites Torment(29 undead dot) and Shock of Poison. Re apply Root when it wears and just med. No pet. Occasionally hit them with Vampiric Curse and they will fall no problem and I have never had an add here. Only time I had an add was when I was re applying root and backed into a mob, other then that they aren't social. Just watch out for Niktitks, mosquitos, and Cast out survivors, they arent undead.
At 40 do Echo Caverns, fear kite anything that cons blue. Also, at 44 you can fear kite effectivly in Dreadlands. I would post guides for these places but really they are just like Overthere minus the goons. At 49-55 I highly recommend doing the Felwithe Guards. Extremely nice EXP and loot, I got from 49 to 55 with 6 aa's in about 3 or 4 days here, killer exp and amazing loot. I would post a guide for Felwithe but it will be as long as, if not longer then this post.