If your going to auto, I don't recommend doing Soul Wars at all, Mage-training-Arena-autoing would give you a higher exp-per-hour rate + give you something with the points in the end.
Magic is not a skill I recommend training in soul wars.
Im not 100% sure what the place is called. But its the area you go to after finishing lost city. You bring a diamond and go left, enter the gated area, go north till you find a guy who sells ruby rings. Buy / Alch / Buy more ( then continue ) You lose less then alching yew bows.