I get the impression that victory points from scenario go to the zone relevant to that scenario. And, if we sign up for, say, the Empire v Chaos pairing scenario we get victory points to cap the Empire v Chaos zones. We will also get these points if we have 12 players signed and ready to go and Destro dont regardless of whether it pops. So, if aiming to cap Empire zones we need to sign for those scenarios and not sign for any of the others. If Destro dont want to join us and prefer to grind SP (Elves pairing), we eventually cap in empire and march on the Maw. I think if the scenario is contested, the points go to the winners.
I don't think that Mythic are enabling zone capture through scenarios alone (at least I most certainly hope not), so I disagree with Envicta : "It implies that in order to take a particular zone in T4, you can only get victory points for doing the scenarios associated with that zone."
So, to cap a zone we would take all the BO and Keeps and then everyone queue for those scenarios. If destro don't respond we lock the zone - if they do we actually get to fight RvR and not grind SP (those who prefer scenarios can queue as well - and still be contributing).
Can I suggest that in order to maximise or contribution, Command (HoJ and/or TBH) issues orders of the day suggesting which pairing we are making a push for. Members then limit their scenario activity (voluntarily obviously since this is not a police state) to those pairings in whatever tier they currently play in. I know this might mean we don't get to do out favorite activity of grinding 50-60 TAs for the day (shame!!!! I hear you cry), but we will as a group be more focused on the campaign and its easier to be on the same page if we know which page that is. Just thought.