To make the Air Battlestaff you will need Staff of Air, Cosmic Runes, Unpowered Orbs, Amulets of Glory, Stamina and Energy potions. Take the RuneScape Gold following items: 81 Cosmic Runes and 27 Unpowered Orbs from the bank and go to Air Obelisk. Charge your orbs, and then travel to Edgeville using the Amulet of Glory. Now you are able to combine the staves and charged orbs to make Air Battlestaff.
To use Fire Battlestaff (Red one): Fire Battlestaff (Red version) You will require Staff of Fire and Anti-Dragon Shield. The most needed runes are Cosmic, Law, and buy osrs gold fast delivery Dust. You'll also require Unpowered Orbs, Stamina Potions and Antipoisons. Additionally, Rune Pouch might prove useful.