Area of Effect: levels 28-70
This section will tell you the places you should level at at certain levels. Unfortunately, there are no pictures, but if I have the chance Ill post pictures of where these monsters are and how they look :D
To get this started, AoErs level FASTER than 1v1 in the pre-60 levels. I've experienced it, and I got 2-4 plvls only. It was tough, but fun! Here are the monsters you should try killing at those certain levels.
Level 15-28
In these levels, you have no Burst Crack, so either you can level by yourself (WILL BE HARD WITHOUT A RINGMASTER) or just get plvled. You can also act as an FS till lv28 by putting around 5 points into Heal and maxing Heap Up at lv20. Do not max Haste however, since you won't need that skill in AoEing and will only waste skill points. When you get to lv28, rejoice, since this will finally make life a whole lot easier.
Level 28-30
At these levels, you can aoe without an assist. Just go to Giggleboxes and AoE spamming star candy and Burst Crack. The Gigglebox spawn is big, so leveling will not be very hard. Stay at the giggleboxes until you feel like the exp is bad. Oh, and go to Server 2, or 3 for AoEing because 1v1 players will be in server 1, stealing all the gigglebox spawns.
Level 30-34
These are one of the bad times of early AoE. That is what I felt. At lv30, I wore a Talin Set (not like it helped a lot) and a Steel Knuckle. Then I grabbed my board and headed for the Fantasy Desert when I realized that this was gonna take a while. Leveling might be hard in the lv30-34 levels, so keep the frustration in, and try your best.
The monster choices to AoE at the moment are Giggleboxes, RockMuscles, Buckrows, or Hobos. Dumbbulls are too hard at the moment, so don't try them alone. I will tell you why these four spawns are not that good for AoEing.
Giggleboxes: Bad exp. Their level is too close to yours. Big spawn, low exp.
RockMuscles: They stun. Rocks have the ability to stun, and without Antidote Potions, AoEing gets real frustrating and bad here. Not so good of a choice.
Buckrows: Higher HP than Rock Muscles but same level. That means longer time to AoE. Thank goodness however, these monsters do have a pretty good spawn. But, the HP is the problem.
Hobos: The Hobos...the hobos are (in my opinion) kinda spread apart. Their population is small, so AoEing may be not the right spawn for you.
Then which spawn do I chose O_o? Well....I leveled with Hobos. But a better option is to get plvled to lv34.
Lv34-38
Yey, you are out of the lv30-34 thing now, and you are ready to AoE.........DumbBulls. DumbBulls have a good spawn, plus, they aren't like Buckrows and have extra exp, AND they don't have any magical powers. Woot, perfect mobs. At this time, you should want an FS. Max Heal FSes are good, because well, you won't die. In a way, "Max Heal = More mobs = More exp". Grind yourself to lv38 and at lv38 you got another mob waiting for you, the Totemias.
Lv38-40
It's only 2 levels, but it's not bad. Get an FS, and go to the Totemias and Burst Crack them like never before. At this time, you should have some Plugs, Vigors or Stams, and a Gore +3 from the Mia Quest. You should also have maxed Beef, and any level (MUST BE MAXED OR LV19 LATER) StoneHand. Go to the Totemias, and level yourself to lv40. It will get hard....so take advatage of the exp you get right now.
Lv40-43
Garden of Rhsis has big spawns. Go to the Garden and kill Tombstonebearers. Go to the Captains, and start spamming star candy like crazy, and level to lv43. Nothing else said.
Lv43-47
Nothing special in these levels. Go to Basques if you want to, but I prefer the Pranksters. They have great spawns. And great exp! At this time you should element your suit to Fire +3. It will help you, since you might get hit 0's sometimes. That means more mobs ><
Lv47-50
Yey! Now its time for Darkon. Go to Darkon 1 via the Plain of Bubble, and level with Leyenas. I didn't like the leyenas, because their spawns are too way apart. I just went directly to Steams, but affected me 200's T^T. So I got plvled to 50. Oh, and buy the Marvel Knuckle right now, and use it for AoE. The damage is great! >>
Lv50-55
The Golden Years of an AoEr. The STEAM WALKERS. Steam Walkers are known for their huge spawn. That is to the north of that little pond kind of thing in the spawn. Kill the Smalls since they also have the Fire element. Unfortunately, these mobs have kind of a low Drop Rate. I only got Penya and sometimes Greens or NPC items. T^T. Exp was great though, and I'll never forget it. Lv55 is easy peasy! If exp gets small in the Steams, go to Steel Knights. The Steels though have bad spawns. You can go to the Nuttywheels as well. They have good spawns too.
Lv55-60
Now, grab an FS. You can't level without an FS now. You will be killing Volts, and they hit hard. You will need an FS, maxed StoneHand, and maybe Maxed Cats Reflexes. Once you get an FS go to the Volts, and AoE them. They have a pretty good spawn too. Exp is okay here to, and to be honest, this is the only spawn to kill after the Nuttywheels because Drillers are horrible spawns. After the Volts, go to ElderGuards. They will give you around 4% each AoE, so don't just give up but try your best! After the Elders, come the Spiders, and these will be the final monsters you will kill before being a BillPoster. Gather, kill, gather kill, and after around some hours of the process, you are lv60! Congratulations!
Lv60-65
At this level, you can kill the big spawn of Cranes. These spawns however is crowded with people. I preferably went to the Forsaken Tower to kill Catsys. But they hit HARD. You need FS (no, an RM) for this, because they will kill in a manner of seconds. Leveling now will give you around 2% exp per AoE with an ADV and leecher.
Lv65-70
At this level kill the Syliacas. The Syliacas have pretty good spawns, and remember to element your suit to water. This will help a lot. Damage will not be very good now, but just try and don't give up. After the Syliacas, go to the Greemongs, and punch like the never before. After long hours of frustration and fury, boom, you are lv70!!!!!!