If you’re using the 2-channel Rotel every day, leave it powered up as well as the Torus. It’s a high power amp with two toroidal transformers and I doubt that it will be warmed up for optimal listening in 15 min. My 300 wpc high current amp took up to an hour to get warmed up. I left it on 24/7 per the designer’s instructions.
I think your HT amps can stay on if they’re used everyday.