After successful BGS Special attack Vorkath attacks you with six basic attacks prior to unleashing one of his special capabilities, which are random OSRS Gold. I highly suggest turning off your run-off following the 5th basic attack . It will help keep yourself focused in case he will use his acid spill attack:

After the special attack, you will go on to do 6 basic attacks. Then he will use different special abilities. For instance, if his initial special attack was Acid spill, the second attack will be a Zombified after which further 6 basic attacks will be used, which could lead to another Acid spill attack and it goes on.

After the kill, gather up the treasure and go back to your home if you have Ornate rejuvenation pool there. If not, just poke him again to start over.

If you lost your life during the fight, you can go to the boatman for the collection of the items you lost for a 100k. It's not necessary to have 100k cash in your bank account It will be taken straight from your bank.

Pro tip:

After you will become comfortable in Vorkath's technique, you can consider learning a technique called "Woox walking" which is used in acid spill attacks that are special. It is basically, you need to attack Vorkath and avoid his swift fireball attacks , by continuously moving between them. To do this then, you must find an acid-free spot, then press attack and Vorkath and quickly move back to avoid stopping on the spot. This method requires a lot of practice and OSRS Buy Gold will mean you pay 100k each attempt to fail at it. If you are able to master this technique you'll be able make the most progress per hour.