Thats why you take a prayer potion, but trust me you won't run out of prayer and probably won't even use it. If this method is used you will win very, very quickly. Take a super strength, super defense, prayer potion, dragon armor or better, helm of neitz, combat gloves , good def cape, sharks or better, use a dragon spear and hit her while she is on ground, if she gets on a plinth use the Special attack to knock her off of it, she takes the most damage on the ground. You should have her down very fast this way. Use a mage protect prayer. The wise old man's mage attacks are lame. Range fails with this quest unless she is on the ground!!!!!!!