Central router + a few good standalone AP connected by LAN cables (i.e. no need WLC) will be the best e.g. Aruba AP or Huawei ws5200 (in AP mode).

Mesh wifi still use some Wifi bandwidth frequency to connect them together which (constrain available frequencies for AP to device) and it still doesnt solve the concrete/steel mesh penetration of wall issue.

This post has been edited by ceo684: Aug 5 2020, 01:37 PM