Oh wow, you've had some very generous fortune.

Although you did lose all your chaos runes, I'd have done the same in your boots. That's just... 30M profit on a single sellout... I'm yet to experience such.

(Maybe if I sold my SGS, lol... But nope, gonna hang on to that.)
Also, the pair of ranger boots, I don't know when exactly you got them (just don't say when they were 30M too, lol), but as of today they're still 6.6M and have been a lot more in the past, so... That definitely beats my luckiest clue scroll drop, which have been 2 zammy platebodies (at approx value of 1.5M each). And those have been from level 3 clues, so it makes them even more inferior.
Most of my "big earnings" have been by first buying some mid-to-high level stuff (sara sword, zammy spear, dragon axe+pick) when they've been at an all-time low and then waiting for them to raise close to an all-time high and selling them back. Highest profit at one time has been buying a dragon pick for ~2m and selling it for ~9m.
Other than that, my money just piles up from skilling/regular monster drops over time, with the exception of some rare wand drop that I once had, which I sold for 7.8M. Again, that was an all-time high to my luck. ;p (Nowadays its price has dropped steadily to 1m.)
Fury ammy is still somewhat useful, but not as useful as before EoC. It grants 0.4% higher critical hit chance as well as +1 more prayer bonus compared to glory, so really, it is one of those gear items you might consider acquiring the last. (Along with steads etc.)