Do ES vambracers stack?

[maestrom]

I guess it just seems like of the three dot-click epics its the weakest, unless I'm missing something.

All have a 9 second cast time.

Necro epic: 75/tick for 16 ticks + 65% snare. (1200 total damage)
This looks like a prettier version of cascading darkness, which is awesome because its such an expensive spell. Great for necros, who are awesome at both fear kiting and root rotting.

Sham epic: Splurt style dot. 1309 damage over 15 ticks.
This is awesome because its a free powerful dot that stacks with all of the rest of sham dots. Sham got a lot of other dots that complement this, which makes them root rotting gods.

Dru epic: 55/tick for 30 ticks + X% snare. 1650 total damage over 30 ticks.
This is a long duration darkness and is blocked by a spell that many druids cast immediately when soloing. At first glace, it appears to do the most damage of the 3 dot clicks, but it takes twice as long to do all of its damage. Necromancers can do ~2400 damage in the same time and Sham can do ~2600. Necromancers and Shaman also have a ton of great dots that they can use to back up their epic clicks. Necromancers have the additional option of fearing.

Seems like the druid epic lags a little behind. Sure its better than anything else druids get. Shaman would love to have a snare and Necros would love to have a longer snare. But druids already have an amazing snare.

Just seems kinda weird to give druids a darkness. We don't fear kite regularly, and if we did, we have a better snare for that. We also don't root rot much, and if we do, whats the snare for?

As far as something else that I think would be better, a modest MR debuff, clicky lightning blast, a self-rune like wizards, I think even rather have the necro click hehe.

Just seems like most of the other epics open doors by either giving new functionality or increasing the power and efficiency of the class's niche. Druid epic doesn't really fit that model, unless I'm just doing it wrong lol, which is totally possible.