Power saving does not mitigate homebrew risks. Using cheat codes (via Gecko, Ocarina, WiiRD) on Wii requires Homebrew Channel, which carries inherent dangers.
WiiConnect24 (standby) keeps Wi-Fi active for updates. Disabling it saves ~$1/yr but doesn't affect homebrew stability.
If you must mod: BootMii as boot2 (pre-LU64) + Priiloader + NAND backup are non-negotiable.