You can get Defence experience as rewards for completing certain quests: * 100 - The Blood Pact * 500 - A Soul's Bane * 600 - In Search of the Myreque * 2,000 - In Aid of the Myreque * 2,000 - Nature Spirit * 2,000 - What Lies Below * 2,812 - The Fremennik Trials * 3,075 - Heroes' Quest * 5,000 - Between a Rock... * 8,500 - Elemental Workshop III (Book of Knowledge, 2x 4250 exp) * 10,000 - Defender of Varrock * 12,000 - Olaf's Quest * 15,300 - Holy Grail * 18,650 - Dragon Slayer * 19,000 - A Clockwork Syringe * 20,000 - Monkey Madness (optional when you speak to Daero, you can get 35,000 instead of 20,000 if you choose Defence and Attack over Constitution and Strength) * 33,000 - King's Ransom * 45,000 - Salt In The Wound