Upgrading Heroes only
Mainly upgrading heroes, but for troops too
For upgrading Heroes and troops equally
Mainly for troops
Only for troops- Heroes r lvl 1-3
I use it for upgrading hog riders and for making them for trophy hunts only, once they are leveled up they just tear through defences and can knock a town hall down in seconds - people don't think they're useful but even 5 behind a giant can be more effective than wizards.
I feel like dark elixir is too precious though, however - sometimes I feel I can't enjoy the troops because of how expensive they are, and sadly they're not even that expensive. I think to myself, "Wow, it's going to take an hour to get the dark elixir back from my level 3 DE drill which I've spent on this single hog rider."
I think the new troops would have been a lot more successful if you paid elixir for them but upgraded the barracks themselves in dark elixir - It would have a lot of people pushing trophies and spending gems too as supercell wants.
"The mind of the subject will desperately struggle to create memories where none exist..."
Barriers to Trans-Dimensional Travel, - R. Lutece, 1889
Level 109, Town Hall 9 with a trophy record of 2852.