Garent

Warning: potentially ultra boring theorycrafting follows.

There are currently two powersets that I believe succeed at utilizing endurance drain as a viable defense: electric control and electric armor. There are a few reasons why I believe they succeed. The biggest one is that endurance drain is only one of their defensive options in a fight. For these sets, endurance drain is basically "If the fight lasts longer than X amount of time, I automatically win as the enemies can no longer attack effectively". Exactly how long X is depends on slotting and the opponent, but reaching X time is not a rare feat for the sets both because of other forms of mitigation in the set and because the archetypes they are available to have no problem with protracted engagements.

What we have in electric blast is another example of a set that fails because its tools are ones that the blaster archetype is often incapable of leveraging. It's the same reason why overcharge is a very questionable mechanic on blasters. They're mechanics that work in a prolonged fight, which is something that blasters are conceptually supposed to avoid. This particular aspect of the problem is something that should be addressed through blasters, not the powerset.

Attempting to change endurance drain so that it is something other than "If the fight lasts longer than X amount of time, I automatically win" is what's often proposed, but I don't believe it's the right path. We have two other options.

-Attach other defensive secondary effects to electric blast powers. The effects in and of themselves, combined with the set's greater ability to reach point X in time would result in a set with appropriate defensive strength for a blast set.
-Increase the set's damage until it is of similar strength to other blast sets with weak, situational, or nonexistent defensive power

Those are the three options that I see, and obviously any proposed solution from someone will likely combine options.

If it were up to me to redesign the set I would do something like the following...
-Attach a chance to chain hit a second target to charged bolts and lightning bolt. Chance should be low enough that it should be a small help to area damage performance but high enough that it's a cool regular occurrence.
-Reduce lightning bolt's recharge/damage/endurance ratio down to a 6 second attack and reduce the animation time (1-1.5).
-Front load ball lightning and short circuit's damage.
-Reduce short circuit's animation time (1-2). Attach a pulsing sleep to its debuff so that enemies affected by it will be randomly slept.
-Reduce tesla cage's animation time (1.5-2) and give it the damage of a standard attack appropriate for its recharge.
-Allow voltaic sentinel to stack and attach some sort of gimmick to it to make it a more attractive and fun power. I like the conductive aura idea, but some measure would have to be taken to deal with the stacking of it on ultra high recharge builds.
-Make all endurance drain in the set guaranteed instead of just 'chance for'. Rebalance end drain values as needed.
-Add upcoming nuke and snipe changes on top of that.

The ultimate goal being to have a difficult to master set with some interesting mechanics, a situational (albeit reliable in that situation) secondary effect, and significant damage.

The "critical hit" toggle doesn't actually do anything. In order to mess with criticals, you want to jump in to configurations and the "effects and math" tab.

I'm curious how you got 74% though. I'm showing that as doing 143 damage on a brute with 3 SOs and 103.4 without slotting. I can't get that to match on a scrapper

Bio armor is going to be extremely popular on stalkers simply because the set has little competition in the offensive focused armor set category. The fact that genetic corruption is very skippable on a stalker isn't that big of a deal when comparing it to other stalker sets.

Oh man, a forum argument that uses image macros?

Blackstar is going to be an even more amazing power. If you slot it on a defender, it's 97.5% tohit debuffing for twenty seconds. That's so powerful that it will still floor the accuracy of +4 enemies, and is strong enough to put about a 15% dent in the to-hit of level 50 arch villains when you're 50 as well.

I think he understands it, and I can understand the complaint. They've really been pushing the stack level thing.

Freezing rain is, as far as I'm concerned, the most powerful power in the game. I'll take it over any power even if me doing so somehow convinces someone that can't spell that they're right about something.

Changing short circuit in to a single target power trades a single target deficiency in the set for an area damage one. Without short circuit, the set would only have ball lightning and the nuke for area damage. Increasing the set's single target damage would be much more easily done by buffing tesla cage and voltaic sentinel.

My experience shows that smaller trials do better as well.