In a nut shell, what you're kinda asking for are items which are better than what is currently available from crafters at 'your lvl', which will last a long time. Basically, you'd like to be able to get an item at say lvl 50, which could last until 70, so it'd theoretically have lvl 60+ stats; effectively making the game easier...
(fair to say that's a pathetic generalisation, so I'll take the criticism)
Unfortunately I cannot download the HCC at work, but I'd have a guess and say the broken weapons are up your alley. The main problem is that most people simply level up too quickly at the lower levels; there's almost no point in putting in anything under lvl 40.
There's quite a few weapon, armor and even jewelry tech kits available as quest rewards (and once the daily's make it live some can be received again). You might find if you hold onto those until you have lvl 40/50 gear (broken weapons or just normal gear), putting those on will make a huge difference and you may actually feel that level of 'epicness'.
For example, the quest series on NT which gives you the form to make Withered Bane (65% chance, +dam against undead) is still quite useful even at the later levels. It would be nice if there were even more of these, to give even more interesting effects, but the devs have a very limited amount of time and must use it wisely. But seriously, have a looksee at the tech kits available, there's quite a few and some are really good. (there's one, something about rose quartz, that can act as a damage shield)
The T6 jewelry is great, no arguments there. As Guaran pointed out, the T6 scales on the whole are a bit of a kick in the shins, but there's a few of them you might consider. The truly epic gear is all hunted for and can take ages to collect, hinting at the balancing problem... what level of effort would you think is appropriate to get truly epic T3/4/5 gear, which you could actually get without seriously out leveling... and that's where the broken items fill the gap
They can be easily acquired solo, but simply take time.
I'm not trying to knock your idea on the head, I'm just trying to think of what is currently available, and what might be able to be added with the current methods used (broken items plus quest reward tech kits).