From what I know, wall hacking in FPS titles can be somewhat prevented by letting the server not send enemy positions to the player’s client until they are actually needed; I’m guessing that the approach for RTS would be similar to prevent maphacks.

As long as cheaters are unable to manipulate values (i.e., resource balance, unit hp, how many units they have etc.), that should be the cheat you need to focus on the most. As far as I know, there’s nothing else out there for that genre