I mean, all we need to achieve this is:
1. Humiliate Asylon and get Phantaria incorporated/converted
2. Open up Barca to conversion and temple-building
3. Complete conversion of Fissoa
4. Destroy and replace Falkirk
5. Convert Aurvandil
Items 1-3 are all totally feasible and seem likely to be achieved. Item 4 is harder, but certainly do-able. Item 5 would be a real trick.
But if we are able to Astroize the whole continent except Aurvandil, that'll be enough for me. I'm fine with having one pariah state.
Number 5 is out of the question. Aurvandil will suffer the same fate as Falkirk. It's strength is not what it used to be, now that there's no (or less) cheating involved.