We did an article that you may find helpful. This will guide you on how to improve wireless connection see links below.
Note: You may need make sure that the distance of the Main modem/router and the router is far from each other to avoid Wi-Fi interference.
Have applied the instruction however whilst LAN is giving reliable internet access from the extender/AP the WIFI signal is not reliable and drops out on different devices stating 'no internet connection'.
I applied the new IP address as per the TP Link instruction to the AP - with DHCP disabled as advised.
Any suggestions to improve WIFI reliability on AP?
Many thanks to the participants in this thread: I've now got my Archer acting as a media converter for ADSL to ethernet, and have posted a how-to here https://community.tpg.com.au/t5/Modems-and-Devices/Howto-using-the-Archer-VR1600v-as-a-network-bridg...
VLAN tagging on the Archer, when acting as a bridge, and not my interior router was the main stumbling block, thanks guys!