Instructions:
Resize this window to the smallest width your browser will go and position it next to your OSRS client.
If this is your first time fighting Zulrah, I recommend you watch the entire video from the start to understand what's going on
Once you have a little understanding of the mechanics of the fight, what you need to do is board the boat on Zul-Andra and don't click anywhere
Then click play on the video and wait until he counts down to one and then pay attention to the instructions
Pay attention to phase 2. If phase 2 is NOT the red version of Zulrah (melee) you must immediately click on the correct option below the video to continue smoothly (a couple of seconds where added from when the phase time started so if you click on the correct option once you realize which one it is, it should continue synced properly)
If phase 2 IS red then you are either on rotation 1 or 2. In this case, you have to pay attention to phase 4. If on phase 4, Zulrah is not on top of the horseshoe (south) but on the right side make sure to click on the option below to skip to the correct part of the video (rotation 2). Otherwise, you are on rotation 1 and no action is needed.
If you have not killed the boss by the end of the rotation just click on the button that says "BACK TO PHASE 1" on the bottom
Credits go to: EVScape for the video give a like and subscribe for more content from him!