
Barrows isn't easy, you'll need to be at least level 70 to do it easily. It's recommended that you use melee and have prayer pots and 43 prayer, although protect prayers only lower the brothers accuracy and you'll still take alot of damage. keep telees and lots of food handy.
Before you start grave robbing, Bring damn prayer pots. And food, a bank is provided. You need a SPADE.
Spades CAN BE BOUGHT from any general store!!!! The Brothers

First hit Ahrim's sarcophagus, weak against melee, his prayer uses the least of magic.
Next it's dharock, the 2nd most deadly as he hits up to 60 through prayer and his set effect works, just eat ever time he hits you, and if he hits you big run away and eat up.
Then go for guthan, he is annoying so if you have a spec to use, use it on him because he heals himself rapidly and the faster you kill him the better.
Karil is the easiest, weak against melee.
Lastly Torag and Verac, both are easy enough and only hit 20s.
Barrows set effects
Dharocks - the lower your hp the higher you hit! great for koing in the wild or 1 hitting npcs.
Guthans - have a chance to heal the same amount you hit!
Torags - turns the other players run off
Veracs - has a chance to hit through armor and defense, great for kqing!