I had a few spare skill points so I though that I'd try out the Death Stroke Ultimate, unfortunately it seems to do very little.
According to the tool tip it was about 385 damage + up to 275% Ultimate Charge (whatever that means). It reality it hardly seems to scratch an opponent, I don't seem to be getting critical hits or stuns and it only effects a single opponent; using it from stealth seems to do nothing extra either.
Soul Tether on the other hand (siphoning ultimate) does close to 500 points of damage to all opponents in range whilst stunning them and tethering an opponent.
I can't think why I'd ever want to use Death Stroke; am I missing something?
I am one of The Great Mediocracy, those whose role in life is to provide the baseline by which The Few deem themselves Great.