how to complete new world order missions. Do you have any tricks, because according to the description, there were over 600 people, not to mention the power.
Yes. New World Order is a quest that is probably balanced around the existence of the Workshop set to Manufacturing; while it is possible to complete it without the Workshop, you can get it done far faster than if you do not have it. You buy materials discounted from Aimee's Goods, create swords or rifles, donate them to Aria's outpost to raise power. Ideally at this point you also have been using the workshop manufacturing for a while now to craft knives, rifles, or auto rifles to earn millions of cash. What you do with the cash is make sure the money of the rebels are $600,000 or higher. If it is, at Conclude Day there is a 30% chance to proc an event where the rebels push for power, spending $300,000 to recruit 100 men. You can also donate men from Fort Sera through the rebel outpost as long as Fort Sera has a minimum number of men (200 I think, or was it changed). Valkess will never allow Fort Sera to be below 200 men.
I would rather you do not release Aria for the passive men/power gain (but it is an option). You need to be training her for her chancellor role and she needs some minimum stats in Science, Academics, Intelligence, Willpower, Discipline, and Administration. And she needs her combat stats up too because she has to be present in the follower group when storming the palace and the mastersphere.