Marking time and making money on Runescape... Jad and the Fight Caves

The last few days have been focused mainly on trying to recover some gold.  After buying the Armadyl Chestplate, it had left me pretty strapped for cash.  So I'm still flipping investments on the Grand Exchange, and actually have done pretty well.  I'm not a high-level investor, I just flip a few things when they're buying/selling well.  Like Pure Essence, that's always done pretty well.  As of tonight, I'm back up to about 8 million.  I've been supplementing my flips with trips to the Aviansies.  They may not be the fastest cash I could do, but they're reasonably fast cash, and fun.  If I really wanted fast, I'd make double natures.  I think that's probably the fastest skill I have for making money. 
Regardless, I'm working toward buying back my Armadyl armor.  It was sold to help level up a skill, and I want it back now because I'm going to do Jad at the fight caves.  I've never cared about the Fire Cape, and didn't want to be tied down for hours without being able to stop at my leisure.  Plus, I'm not very good at multi-tasking.  I think Jad will kill me many many times, because I don't think I'll be very good at prayer switching and keeping everything going all at once. 
But it's time to try.  All my combat skills, including ranging and magic, are maxed.  I've done all the quests.  My character has the levels to get me there, but I lack the real-time fighting skills.  If it weren't for the Elite Acheivement Diaries, I'd be happy just to let Jad live.  But I want all of the Elite rewards.  Not so much because they're cool, though some of them are.  But just because that's a goal I set for myself.  I got the Ardougne Elite Cape back when it first became available.  Then I got the Seers Village Elite, which gave me the double-enhanced sword Excalibur.  I really wanted that sword... healing 400 points and getting 15 extra defense every few minutes is a huge plus!  Then I got the Falador Elite Shield.  Now, I have all the required skills to get the Karamja Elite reward, but I have to actually beat Jad in the fight caves to get it.  Which leaves me where I am now, scrambling to get enough money to buy the gear I want to use. 
This is going to be tough, because I'm so bad at that kind of fighting.  Usually, I just bulldoze my way through things and hope for the best.  This time, it's going to take finesse.  I'll probably be down in the fight caves for months.  Wish me luck.  Oh, if you've got any advice, please share it with me!