Bring a tortoise. Make sure that OSRS Gold you have a brew:restore ratio of 3:1. If you can, bring 2 fruit bat pouches and scrolls for when your tortoise dies, fruit fall is only good for soloing Rex, it's not really efficient if you're hybridding/tribridding.

If you can't access a fruit bat, then bunyip may be the best option although that will limit the duration of your journey as it can only treat 80LP/minute. If you discover that your excursions are too short when using an animal or a rabbit, you might have to bring Guthans in lieu of Veracs as well as supplement the healing of your bunyip with Spinolyps.

If you have an Enhanced Excalibur from the Hard Seers Diary, it's equally beneficial to utilize it since the special attack is able to regenerate 200LP every five minutes, and also raises defense. Once your tortoise's tank is full, you'll want to dispose of it, and then bring out an excalibur fruit bat.

Be sure to have brews as well as restores in your inventory to provide emergency healing i.e. Don't summon your fruit bat if you're at the end of your beer, because if you misslure Rex and it gets ugly. Don't forget a one-click emergency teleport.

So I have... 241k of longs made from maple in my account that could double in value if alched. But .... an additional (something similar to .... 3k alchs? It was quite painful. I'd probably be tempted to Cheap RS Gold autoclick even if it wasn't so stupid.) But I'm able to earn money from slayering, as I have a good set of equipment in the moment.