If you pi is behind something and access is a pain these will make your life alot easier.
https://www.modmypi.com/raspberry-pi/co ... -band-5ghz
https://www.modmypi.com/raspberry-pi/ac ... h-touchpad
I built the MagicMirror so my pi is behind it. If I need to reload or something happens that i can not get in with VNC, I just use the keyboard that i keep on top of the mirror. and having 5ghz wifi makes it work alot better.
I run the mirror software and Alexa on the pi at the same time, it has been running for a few days no glitches.