If I understand correctly you can ascend after finishing Europe Huge.
My question is if you need to ascend instantly after finishing Europe Huge or is it possible to play some more maps and then ascend whenever you feel like it?

option b

It is possible to play some more maps and then ascend whenever you feel like it

You can ascend after completing Europe Huge, but i would recommend completing as much as possible (but not replaying levels you already completed)

If you ascend all the levels get locked again, so I would try to complete as many of the levels i skipped before ascending. On top of that, ascending costs 100 AP now, so the more AP you earn before ascending, the lower the relative costs of ascension is.

Edited 9/6/2021 12:38:18

Yeah, I'll definitely play through all the levels before ascending. It will be a nice help to have the 30% ore bonuses (if I make the time limit) and some more advancement upgrades before starting Europe Huge.
Thanks for all your help guys!