I control from 60-92% with 900-1000 feed into the dam orb, its full, still casting the spell, Nothing. Wont trigger. Campain. So what gives?
You must control at least 67% of the orb to win with an Ascension victory. The latest patch will change it to 75%. If you control more than that then it probably is a bug.
[EDIT] There seems to be an issue with the campaign mode Ascension goal according to the steam forums. The developer is looking in to it now - hopefully it will be fixed pretty fast.