et12 pro

Hi, What is the best way to aimesh wirelessly, or make the ET 12 work well wirelessly with the GT-Ax6000? I just came into a free ET 12 unit and Rog Gt-ax6000 at a bargain price. I understand it may be a better match with an Asus tri-band unit but I really like the GT-Ax6000. Since my house...