Hopeling

The non-Superior versions are also tradable, and will be auctionable once they go live, although I'm not sure if that particular feature is working currently on beta. I estimate that they'll settle somewhere around the price of purples, if not lower - expensive, but obtainable with a non-absurd amount of effort, especially if you only need 1 piece like the proc.

I've only read the first and last page, so I apologize if this has already been covered...

My two cents:

I don't have Defensive Sweep Just 40-60% end reduction in my attacks and toggles, which isn't abnormal for an IO build, I think. I rarely use Crushing Blow, either - Whirling Smash has higher DPA, so I use that even for single-target.

I mean, the set definitely costs a lot of endurance, especially while leveling before you have level 50 IOs with huge enhancement values, all the procs/uniques, and all the accolades. But it's just ridiculous hyperbole to claim that you "do not even come close" to endurance sustainable.

I'm running around with the proc in Burst, hitting big spawns in Perez Park, and I haven't seen it proc multiple times from one attack, nor does it seem to have a higher proc rate whether I hit one guy, four, or ten.

Proc rate does seem to change with recharge, though: it appears more likely to go off in Concentrated Strike (nearly always) than in Quick Strike (maybe one time in 3). (Similarly, the Corruptor proc goes off sometimes in Single Shot, but 100% of the time in Overcharge. That's a different proc, but it has the same "X times per minute" text so I assume it is a similar mechanic.)

I have no idea exactly how the proc chance is calculated yet, and my testing isn't nearly rigorous enough to deduce it. Right now I'm just trying to get a feel for how it works. Heck, my sample sizes are small enough that I could be completely wrong and I've just encountered a fluke.
But IF I'm right, the best place to put the proc wouldn't necessarily be a power with a slow or fast recharge - instead, it would be a power you most often use as soon as it recharges.

If I could only choose one, I'd choose TW. I have a 50 of each, and although Street Justice is a cool set, it doesn't really stand out as awesome the way TW does. That's just my opinion, though.

You'll be 50+2 in Incarnate trials, because the Lore shift only applies there (and the Destiny shift, once you get that). Everywhere else, your Alpha shift will make you 50+1. You can see your level shift in Combat Attributes.

You don't need any KB protection IOs at all, Indomitable Will covers that.

Your end usage looks worryingly high, considering that your attacks aren't slotted with a lot of end reduction. That might not be an issue if you've already got Ageless, though. You have very high recharge, and perma ML/Hasten, even without Spiritual, you might consider Cardiac instead? Or possibly Agility, since the heal bonus in Spiritual isn't doing much for you.

Hasten does not stack, even if you get the recharge below 120s, but its recharge is improved by its own buff, so it looks like you've got perma.

A few little things: You've got two too many 6.25% recharge bonuses. The membranes in Mind Link won't work once the HO changes go live. You could move that plain Def from Hover to TT:M and gain half a percent of defense.

I found that endurance was becoming a serious problem as I approached 50 and got several big expensive powers (Psychic Wail, Aura of Confusion, Dark Obliteration) on top of all the toggles. So yeah, you will definitely want Cardiac or Ageless. Personally I went Cardiac so I could use Rebirth.

There is barely any part of that post that I would agree with.

Like you said, blasters got their HP raised a long time ago, but not their cap. I don't think that was an accident. Thus, I think of being able to easily cap a blaster's HP as a feature, not a problem.