Not specifically recommending Broad Sword/Dark Armor over your alternatives, but I have my endurance under control on my level 35 Katana/Dark using just SOs. Frankenslotting would make it even easier. So would any of the endurance IOs. Yes, you're going to have endurance problems. But those problems are easily solved with some liberally-sprinkled endurance reducers, and even more easily solved with IOs.
"That's because Werner can't do maths." - BunnyAnomaly
"Four hours in, and I was no longer making mistakes, no longer detoggling. I was a machine." - Werner
Videos of Other Stupid Scrapper Tricks
So, I've run all the existing Scrapper powersets at least to 37, with the exception of Martial Arts, Broadsword, and Dark Armor.
I basically want to try them all except for Martial Arts (is it the gunshot ricochet knockdown? the silly tier 9? dunno).
So the question is for i16: Elec/Dark and Broadsword/Elec or Elec/Elec and Broadsword/Dark?
I'm leaning toward the Electric split, especially because Broadsword/Dark looks like it would be unpleasantly end-y, and the ELA recovery tools and +rech might make Broadsword more wieldy. (Is that a word?)
Other arguments for and against either pair?