What is the best armour to wear for mage dueling in runescape?

ok so i want to make good money on staking with my 99 mage at the dueling arena but i need to know what armour to buy i have 105m so money isnt an issue i just need to know what armour is good bonus i have 60 attack and 1 defence but im aming twords 70 so any armour between 1-70 will work please help any advice would help as well thanks so much!