@regisc
Hello, there are two options available.
First, you can use Archer A7 as the main router, then you can enjoy the advanced features of this router, like parental control, access control or so; but there will be two routers existed, double NAT issue will be there.
Second, you can configure the Archer A7 as the access point, then there will be only one router, no double NAT issue; definitely, some advanced features are not supported anymore.
You can read it to get the difference between router mode and AP mode.
Good day.