I have a Dark/SS Tanker and yes, the end is horrible. If you have the money, then the numina's and miracle uniques will make a noticeable difference especially coupled with the Performance Shifter proc in Stamina. At the moment I have the Numina proc in and end is so far, manageable.
I opted not to take Cloak of Fear as Oppressive Gloom works nicely (also a low end cost and the self-damage is negligible I find) and I'd say with Footstomp too you have some decent mitigation. It will be more manageable as you say with Stamina, and with fury I imagine it will be a monster! 
I made a SS/DA on day one of Issue 6. END became a problem when I ran COF and Death shroud together. In the old days you also needed acrobatics. The Rage crash combined with the Hasten crash hurt. Its normally around this time you need to use the 17 end from Dark regen.
I got a leg up in my early 30's and ran from L32 to L42 with several Kin. So I did not notice what I had till it went away.
IO brought this character back to life for me with patience I have managed to low bid nearly everything I needed.
I have nearly every IO Set bonus that covers +End or + recovery I can find. It was the single focus of the IO build. Plus the preformance shifter Proc. Other than when Rage and Hasten crash close together its pretty good now. I like to move at a fast pace and it can almost keep pace with my other brutes. All my attacks have a minimum of 66% END reduction. DS, COF and DR all are 98% or higher.
One thing it does well is camping. With COF or OG(got an Imm proc in OG) you can park and let Foot Stomp and Death shroud do the work. While you go batters up with KO blow and haymaker on Bosses. This is great on large teams or for countering ambushes for the entire team.
Yes its an END Burning monster. Can it be made better sure. But it does mean subtle play style changes are required. Is it powerful heck yeah but situationaly. Some things just eat holes in DA.
Pinnacle
Arch light L50 INV/SS
Psiberia L50 Kin/Psi
Screaming Mentallica L50 Sonic/MM
Infinity
Arc Voltinator L50 SS/Elec
Mind Fire Kinesis L50 Fire/Kin
Flaming Screamer L50 Fire/Sonic
Wouldn't dropping Hasten make the endurance issues go away? I have a Fire/Dark brute myself and I can't imagine making the endurance issues worse by taking hasten. Mine is very manageable without it and I can imagine it would be a problem if I added hasten in there.
I agree but I normally leave hasten on auto and control when I use Rage. Once I get some fury I only need Rage for hard to hit targets or tough targets. On SS I like hasten on my Fire melee I find I have a better chain and do not want Hasten. I also have a Fire/DA themed as a Balrog.
Pinnacle
Arch light L50 INV/SS
Psiberia L50 Kin/Psi
Screaming Mentallica L50 Sonic/MM
Infinity
Arc Voltinator L50 SS/Elec
Mind Fire Kinesis L50 Fire/Kin
Flaming Screamer L50 Fire/Sonic
Initially this toon was great to play because I was able to leverage the damage aura to save endurance but now I got all these toggles I dont think I can keep doing this and still attack and survive. Right now this toon is in the teens but I dont think stamina is going to be enough. I originally did this toon to see if the SS rage power would make death shroud work better as well as help CoF's accuracy penalty. I just dont think I will make it that far due to endurance issues. I got other dark armor toons but this by far has been the greatest end hog like ever. So far all attacks are slotted two accuracy IO and 2 reduce endurance cost IO. The toggles got 1 reduce endurance IO and death shroud has two reduce endurance IOs. Will the rage and/or hasten crashes make this toon unplayable in the end?
Bump and Grind Bane/SoA
Kenja No Ishi Earth/Empathy Controller
Legendary Sannin Ninja/Pain Mastermind
Entoxicated Ninja/PSN Mastermind
Ninja Ryukenden Kat/WP Scrapper
Hellish Thoughts Fire/PSI Dominator
Thank You Devs for Merits!!!!