Vorkath
Vorkath is similar to most dragons in that it is weak against stab melee and heavy ranged. Upon awakening, Vorkath's attack pattern consists of six random standard attacks, one special attack, another six standard attacks, then the other special attack, and so on until defeated. During the fight, it is recommended to always maintain at least a super antifire potion and Protect from Magic, or a regular antifire potion and a dragonfire protection shield.
Whether to have run on during the fight is a matter of preference. Keeping run on, except for during the acid special attack, increases the margin for error when dodging the fireball attack, but requires the player to manually toggle run when the acid attack occurs.
Guide, gear, inventory, locations, pictures and money making rates from the OSRS Wiki (CC BY-NC-SA 3.0).