It's usually really good about remembering things. Maybe I need to find an extension for it like that?
The witches should totally be involved and it only being a decade allows for that. I just think that the Aschers went into hiding in the mortal world in order to try regroup and increase their numbers. Rather than doing it in the Beyond, where they were targets, they went to Arillius to try to find fresh blood. Instead, it ended up splintering them as the last matriarch wasn't as strong as the ones before her. That's why I need it to be several generations since they were slaughtered. I want to say that Aryah didn't get the handful that were already in Arillius protecting the mortal side of the veil (they weren't considered a threat or she couldn't get to them). Without a powerful matriarch to keep them together, the family and the magic fell apart. What Demos agents were on the other side of the veil managed to get a few of them before they were taken out.