Ancients give you around 33 attack if I am correct
OT: You only need to do the quest Death Plateau which will get you 17 attack, after that you should train the rest of the attack yourself.
Another good thing you can get is Mithril RFD Gloves which is slightly cheaper than combat bracelet.
I would not recommend making a corrupt pure as not many low level pures PK in the wildy from my own experience, and when you kill them you will not make money back from spending 9-10M on the Corrupt Vesta Or Corrupt Statius:embar: