ok, here's what I do to farm with my ranger at lvl 18:
Get to the desert as fast as you can, do all the quests you can there and get dust trap, flame trap and barbed trap.
Now get a nice good looking druids armor from droknar (in which case u can buy some of the skills noted above) or get a cool looking armor, if you go for the cool looking armor, make sure you get a staff or something that gives you more energy.
Another skill you will need is serpents quickness, to drop your traps faster, you can also see when the 90 seconds are over, because then your second serpentsquickness will nearly be reloaded again (45 seconds recharge time)
You will also need a superior expertis/wilderness survival rune, both if you can handle the -150 hp, I myself used the superior expertise. Then you need a cool mask take the expertise or wilderness one.
For attribute points: take at least 12 wilderness and 10 expertise,but I would advise you to get more expertise if you dont have druids armor and a staff, more wilderness is always welcome.
While trapping sometimes, enemies will come to you, and you may have a problem because you will be interrupted all the time then. The places where I advise you to trap are filled with melee mobs, so take Throw Dirt, the 10-15 seconds blind will give your dust trap enough time to reload. Then drop a barbed trap and run away faster than they can follow (yay crippled
)
So now we have: Serpents Quickness (SQ) Barbed Trap (BT) Dust Trap (DT) Flame Trap (FT) Throw Dirt (TD) thats three skills to go. You can use those skills to adapt to the area u farm in.
I will explain the farming in 2 different areas: one for Ettin farming (getting valuable runes) one for minotaur/dune burrower farming (major xp, and desert keys/gold weapons from the burrowers)
Ettins: You can find them in north kryta, in the area between beetletun,bergen hotsprings, ascalon settlement. And if you have not done the farmers quest (where you can get the lost hog back) there are many ettins coming your way when u do it. If you do the quest, just die to the ettins, they will run to apoint close to where the hog was at start, they will stand there forever, until you lure them away (to your traps ofcourse)
If you have like 15 expertise and a druids armor/ nice staff you can keep dying until 60% dp, and still farm them with ease.
If you have already done that quest, just get someone to run to ascalon settlement for you (200 gp at most, tough many do it for free) or run there yourself (take troll unguent and dodge/stormchaser). Watchout for the avicara's tough and the lynxes can trigger your traps as well. From ascalon settlement go to the portal west of town, and walk north/west all the way, from beetletun keep walking east.
Ettins have this very annoying skill called irresistible blow. So blocking stances dont work well against them, TD is still very effective against them tough. You might want to have a running skill here, if they come to you before you have set enough traps. Another very annoying skill they have is healing signet, tough if you take your time trapping, you can kill them at once without them having a chance to use healing signet. Apply Poison works fine on them too, gives them even harder degeneration! If you are having trouble with strugglers, I suggest taking Troll unguent, Apply poison and Distracting shot.
Minotaurs: The best place to farm minotaurs is in the start of the Elona Reach mission (Elona reach is a mission post north of augury rock, people run there from augury rock all the time for 300-500 gp)
There are hordes of minotaurs and dune burrowers there! at the start there is a guy that gives you a crystal, just drop it, because you will not need it. Right at the beginning there are 2 minotaurs and a weird looking plant before it, avoid the plant because its a sort of mine, if you come close you get crippled and bleeded (minotaurs too, so if you sneak past it, the minos will trigger it and get slowed so you can get away safely)
You can come pretty close to the two minotaurs because they are not moving. Just put many traps there and let them attack you, you just stand on your traps (same for ettins btw) or stand a bit behind them. They will use endure pain to survive and then they will run back, because they run from the AoE (all around) damage of your FT and DT. Just continue trapping and the next time they come to you they die because their endure pain is over.
When they are dead it's time to go down, when you go down on the right, a minotaur will come towards you, just drop a DT FT BT and he will run away again, keep doing this untill he is dead.
When you are down, you will see many minotaurs run around, just look how far they run and make sure u stay far enough away (I stand next to the rocks where the two minotaurs were) Then start using SQ followed by all traps as usual. When you are ready, shoot an arrow at some minotaurs, and usually 3-5 will follow. Stand a bit in front of your traps and use a blocking stance like whirling defences or use throw dirt, when they are all attacking you, run towards your traps.
They are all clustered and will all run away, use this time to drop more traps!!!! They come to you again and they will die then. To kill these minotaurs faster I advise you to take apply poison. and just shoot around while your traps are reloading.
When you cleared all minotaurs you can see, u will have to go further and attack the dune burrowers. Use TD first immediately followed by Apply poison, then FT BT and DT last, so he will stay blinded. then proceed hitting him with a SHORTBOW/AXE/SWORD so he will not be able to finish his Healing springs. You will take some damage in the end but he will be dead before you are. Do this trick on the dune burrower at the wooden bridge. Do it at the next ones too. Then you will see minotaurs again, use the ghostly hero to aid you in that battle (drop 6-9 traps and lure them, saves time). Sometimes there is a chest there as well (to use your keys on).
So for minofarming go something like: DT FT BT SQ TD whirling defence apply poison and troll unguent. Use whirling defence whenever you go low. It will allow you to sneak some traps in which makes them run away for you to have time to do whatever you please (most likely drop moretraps and poison them
Now you will get a lot of minotaur horns... what to do with them?, well pretty easy, right outside Elona reach there is a collector. He gives MAX items for your horns, you can trade those easily, especially the bone staff and the firewand!
As you can see, this *guide was written for a Ranger/* the secondary proffession doesnt really matter, tough I used warrior for cyclone axe + apply poison.
I hope this guide is of any use to you. If I wasnt clear on something, please message me in game *mistical miss* or send me a private message on this forum. Excuse me for my English, im from Europe (holland).
Good Luck!
EDIT: aye, long text sorry for that ....
that explains.