Note:This is not a whole guide on Desert Treasure, it's just preparing you to know its challenges.

Ok, do you think you're ready to do Desert Treasure? Well you need a decent magic level. A good defence and 43 prayer is recommended for all level players. 
Here are some tips on the monsters.

Fareed- Rank on 1-10, 3. Tips- you need a facemask and ice gloves. The ice gloves are needed for a weapon. YOU MUST USE PRAYER ON HIM!!!!! My friend got killed in 2 hits without prayer. Just have protection from melee on and prayer pots just in case. 

Damis-Rank on 1-10, 8. Tips- He can be your worst nightmare. The first form is as easy as taking candy from baby. BUT HIS SECOND FORM, is very difficult.  I wouldnt recommend meleeing him. He drains 6 prayer every second or so. This is no joke. But my technique was to ddp++ special him 4 times, run away from him, and pot up a little. There should be about 2 safety torches. Run behind a torch and wait. He heals poison easily but you will have a full special bar by then. Repeat this process and collect his remains, the shadow diamond.

Kamil-Rank on 1-10, not sure exactly, but he was easy for me. I would say around 5-9.
Everyone says how hard he is. He isnt that hard. You must kill 5 trolls, that is probably the hardest part. I highly suggest restocking after that. Once you did and your at kamil, i suggest using fire bolt. It is a nice easy low level spell, and the snow doesnt effect the magic as easy as it normaly would. Use melee protection, His magic is not extremely powerful, and he doesnt use it all the time. Make sure you have super restore potion with you.

Dessous-Rank on 1-10, 8ish to 10ish. I hate to say it guys, but for me he was the hardest no doubt. DO NOT MELEE HIM!!!!!! He hit 19s on me all the time with melee and i died. This is the easiest way to kill him. You open his tomb, with protect melee on. Then you run on the other side of the fence mage him twice, he WILL teleport over, but you can run on the other side, mage him twice again, and you will win. And believe me, YOU CAN USE RUNE ARMOUR FOR THIS. I actually highly suggest it. You hit just as hard. Wind Wave is also recommended.

Pyramid- rank on 1-10, 5ish to 8ish. This can be tricky. When you enter, make sure you have protect melee on and run on. If you fall out, you will do minimum damage and start over. Just restore prayer when you have to and have energy pots/strange fruit when you need to. Scarabs will appear and they poison you. Just have an anti, suck it up, and continue. Once you're done Azzandra will teach you ancient magicks.

Stranger- He will only occur when you have a diamond in your inventory, just teleport out and bank it, he wont appear.