Connecting a Three 5G router to an access point, not via Ethernet?

[humourme2]

I've swapped out a Virgin Media hub for a Three 5G router. The VM hub went into an Asus rt-3200, in turn supporting a Powerline network to extend coverage through internal brick walls. I've set the Asus as an Access Point as most devices already connect to it. The Asus is currently connected via powerline adapters (AV-600) to the Three 5G router. There are three other AV-600 powerline plugs for various devices. It is too convoluted to run an ethernet cable directly as the router is in the loft and the access point on the ground floor. I get excellent upload/download speeds when connecting directly to the router (~400Mbps download) , however, this drops to a still acceptable 50Mbps if connecting via the access point (via 5Ghz). The bottleneck then appears to be the Router-->Access Point.

Is there a cost effective way to improve the connection between the Router and the Access Point that doesn't involve wiring? Or should I abandon the Access Point for another wireless solution?

 

[Orcvader]

Just to make sure, is it going like this?:
5G router -> powerline -> Asus

I suspect it's the powerlines holding the speed back, do wired devices on powerline also get similar speeds?

If running a proper cable is not an option I would be tempted to try place the Asus on the floor below the router, then use Repeater mode so it connects to the router wirelessly, and see if that works any better.

 

[humourme2]

Just to make sure, is it going like this?:
5G router -> powerline -> Asus

I suspect it's the powerlines holding the speed back, do wired devices on powerline also get similar speeds?

If running a proper cable is not an option I would be tempted to try place the Asus on the floor below the router, then use Repeater mode so it connects to the router wirelessly, and see if that works any better.

Yes that is the setup. Good idea to move the Asus; there is absolutely no need for it to be where it used to be. Its been in position for so long I'd not considered moving it. I'll look into repeater mode. Thanks.