When starting Phase one, you need to pick which web you want to go through immediately. You will set it on fire and take about 1 minute to incinerate. Each web leads you to a different-styled phase two. Use quick Praters to protect whatever mode Araxxor is in along with your attack-styled turmoil and protect item. If Araxxor is in range mode, protect range. He will stay that way till Phase four.
The best effective way dealing with Araxxor on Phase one is to sip your adrenaline, get to 100% as fast as possible and use your ultimate. Get to 50% and use one threshold. Get back to 50% and use devotion (if you have it) if you don't, use another threshold.
Keep using abilities along with devotion, thresholds, and ultimates and get Araxxor down to the point where he has to heal himself to stay alive, which is around 5,000 life points. Try not to use a lot of your Saradomin Brews during this phase, a couple sips should get you through.
Bear in mind that when he sucks you in be sure to click back so you're not cleaved with a high hit. Also when you're mummified you need to spam click the ground. Do not pass the space where you set the web on fire before getting Araxxor to 5,000 life points or phase two will start!