If there's absolutely no one in Burstinglobs trying to find a solo mage, simply ask if anyone is hybridding/tribridding and can allow you to hop worlds out of theirs, simpler than needing to kill Supreme/Prime to begin your journey. Bring a tortoise and make sure you have a brew:resurrect ratio of 3:1. If you can, bring 2 fruit bat pouches and scrolls for if your tortoise expires, fruit fall is simply great for soloing Rex, then it's not really efficient if you are hybridding/tribridding.

In case you can't get a fruit bat, then bunyip will need to do although that can limit your excursion as it could only heal 80LP/minute. If you find your excursions are too short using a tortoise/bunyip, you may have to bring Guthans in lieu of Veracs and nutritional supplement your Bunyip's recovery by assaulting Spinolyps.

When you have an Enhanced Excalibur in the Hard Seers Diary, it's also good to work with there as the special attack has the capacity to heal 200LP every 5 minutes, and also raises defence. Ensure you have cleanses and cleanses left on your inventory for emergency recovery i.e. don't summon your own fruit bat when you're entirely from brews, as if you mislure Rex then it may get ugly. Don't overlook a one-click teleport for crises.
Let's us to read OSRS gold information on https://www.rsgoldfast.com/