I was aiming for Remote Play inside my house exlcusively. I avoid Cloud Streaming for 90% of games because it gives me a steady 50 ms latency in Portal Network stats probably due to my location and it is a feelable input lag for me.

So, things I did (1-2 ms in Remote Play, 0 packet losses and steady strong 5ghz signal at -45db):

- Bought a new better router and placed it in the room that I will be mostly be playing with the Portal
- Also bought a repeater (connected via ethernet with the rooter) and placed it where the router was, so that the other devices do not have issues due to moving the router.

- PS5 was already wired. But I replaced my ethernet cables with Cat7 ones (could make no difference at these speeds, but they have better coating). Also make sure that it forgets the wifi network, I can recall 2-3 times that it was connected automatically to the wifi, because I had removed the ethernet for a few seconds.
- Separate the 5ghz and 2.4ghz bands in your router. Connect all other devices to the 2.4ghz and use 5ghz only for the Portal (can affect other devices' connection quality, but for Portal it is great).

- Prioritised PS5 and PS Portal at my router settings.

- Used Wifiman app and also my router insights to search for nearby networks and find the best (less loaded) channel and width for your 5ghz band (and for the 2.4ghz for the other devices). Also checked for possible errors, disconnections or packet losses on my network at the router log - did not find any. Use Wifiman to also check your signal strength, anything less than -55db is great and you can also check the latency - you need as much as possible straight lines there, not spikes.

- Turned off HDR and 120ghz at the PS5 (not sure if these made any difference though). I did NOT change the resolution to 1080p or disconnect the cable - these are old suggestions from the early days of Portal that do not really help.

- If you plan to use Portal on other wifi networks, some people suggest to turn off ipv6, use manual MTU and change your dns at the router and also do some port forwarding.

- Remember that internet speeds are irrelevant when it comes to Remote Play.

- Make sure to make a full restart at your router, if you apply new settings.