Ask a Thief Thread.

Eh, I stopped using it when SB did more damage. When I was training from 50-70, if a monster had only a bit of HP left, I would just whack it and it would die. It doesn't seem like it would be worth using DS since SB can be spammed.

I did use DS up until 4x since I maxed SB after mastery. But since then, I haven't even touched it.

DS is still a viable option as a finisher when a plain attack won't kill it. It's a faster move and costs less mp, so training perfectionists and people who are really low on cash might appreciate it. But I'd say that simply one more SB is fine, too.