killing iron dragons

This was so simple that when I tried it, I was like awesome!!
take with you:
Antifire shield
Antifire potions
Glory
875gp
cheep hatchet
4 or so sharks
range or mage equiptment
armor is optional
High Alch runes

Go to brimhaven dungeon. Pay 875gp to get in.
(zybez.net has a good map of where everything is under dungeon maps)
Go to Iron dragons
equip antdragon shield and stay dosed on antifire potions
kill to your heart's content or until you run out of potions.
Stay out of range of their mele attack, as it is a bit rough.