Not sure if these are bugged or if we are doing it wrong. 1. End of Empire - Stalwart Guardian (Group) - this is giving the raid achievement so I assume its bugged but doing it correctly 2. Balance of Power - Unburnt - We have avoided drakes and still none of the group has this, bugged? 3. Fell Foilage - Atrocious (Group) - Stacked 6 cactus on top of each other and it didn't change, not sure exactly what we are meant to do to get this to work - bugged or has someone got it? The rest we have completed.
Stalwart Guardian and Unburnt were mentioned in the Test patch notes to be fixed. The Atrocious achievement is probably broken and will probably remain broken after January's patch.
We haven't had luck with atrocious either. I haven't seen it mentioned as being bugged like the other 2, but hope it is.