LVL 1-10 - If you start in Jobe, start by hunting spiders and snakes. At around lvl 4 start kicking the crap out of beit gras,chimeras, stalkers. Ar around lvl 6-7 kill mortiigs and hecklers.
LVL 10-15 - Nescanse bridge kill all you can see there
LVL 15-20 - Very nice exp/kill you get from Hiathlins at nescance frontier
LVL 20-30 - Crippler cave is the way to go here, if you have a team this will make your lvling alot faster (btw there are 2 dungeons here wich are good for soloing 1 in the middle is for lvls 25-40, the one at the end of the cave has higher lvl mobs around lvl 40-50)
LVL 30-40 - your best bet would be Two mountain area with croakers, or an alternative malah mobs at clan core statue
LVL 40-50 - this is where team is a must(or a pocket tank
) start doing hecklers, because you have caped exp you can do some research on the way if you have LE expansion
LVL 50-80 - unlike others i would suggest you stay at nesc hecks till middle 80 you will be able to crunch trough them quicker with every lvl, and if you work on your gear every 20-30 lvls it should go realy fast and easy.
LVL 80-100 - this is where the real fun starts head to beach in elysium (clan statue barter, omni spade) there is a team most of the time so you should have little trouble getting a spot for your fast exp and if you are lucky nice loot (pearls, spirit apparatus, mortiig weapons, paterns) I admit at lvl 90 to lvl 100 it gets a bit borring but you have to make it through
LVL 100-135 - you can start doing ely hecks (with team ofc and doc is advised)
LVL 135-150 - you can stay in elysium and kill hecks, or make your way to adonis and kill hecklers(yes ladys and gents i just said to skip sheol)
LVL 150-180 - this is easy and borring you need to kill adonis hecks for all the way
LVL 180-200 - you could go to penumbra and trie looking for teams or do solo mishes there, but its much better exp doing good old ado hecks, i know you wanna puke every time that you hear about adonis, but there you have better xp/hour then waiting all day long in pen for team(it seems no one lvls in penumbra these days)
LVL 200-210 - this is easy and goes pretty fast when you make your way to inferno and start doing easy inferno mishions(here i have a tip for you: if you have 220 puller in team then the mish reward will be much higher)
LVL 210-220 - here you should start doing 220 hard mish in inf as the SK raises pretty slow
Erm i guess thats it we are 220
, now we can start doing APF, LE mish for AI lvls and anything you like.