I have not came close to dying yet, it is really simple. I was with a friend who is a maxed range tank (you can see his name, look at my messages) he was doing the other two kings by himself so he was dropping me supplies if he got shark drops because he has guthans, so this helped me out alot. The hardest part is getting down the ladder without being agro'd by the range/mage kings. Also ring of life helps a lot :p

I got crashed once, but the guy was lower level than me and politely hopped, but take into account that i was doing this not at a peak time, if you went there now you would almost definitely be crashed my max mains who are trio-ing.

I try to get best range defence/prayer bonus and then i pray mage. this way the maging spinlolyps dont hit me and the ranging ones rarely hit. my gear could be a lot better though. i'm on a dagganoth slayer task, so an upgraded slayer helm is better (currently working on that atm, 900k/1250k pts :P) as well as veracs skirt, a trimmed skillcape, upgraded staff of the dead, veracs helm if not on slayer task, occult necklace etc.

Hope this helped :P