Originally Posted by
SirValentine
Are you sure it's not counting on any difficulty? Last I heard, on EVERY difficulty, it was that counting kills...toward whatever creature is the equivalent in the Heroic Normal version of Devil Assault. So, yes, when you're killing an Orthon, your Troglodyte count goes up (or whatever).
---break---
OK, I just ran a Heroic Normal Devil Assault. All the bats & scorpions in wave 1 counted just fine. The hellhounds and many tieflings of course didn't count because they have no entry in the Monster Manual. All the troglodytes in wave 5 counted just fine.