2. Go to the battestave shop in Varrok and buy as many battlestaves as you can from Naff.
Varrok Armor obtained from task rewards
Varrok Armor 1: Easy tasks (16 Battlestaves you can buy)
Varrok Armor 2: Medium tasks (32 Battlestaves)
Varrok Armor 3: Hard tasks (64 Battlestaves) As well as you can enter the Cooking Guild
Varrok Armor 4: Elite tasks (80 Battlestaves)
Note: You can only do this once every 24 hours.
Each Battlestave is 7k and you can sell them at G.E for 7.4k
* i do not take credit for this *
just found it useful