Do I need higher quality power cords?

I have a Torus for my gear. I use stock unshielded power cables. I've tried using stock shielded cables and I didn't like them. I did later find out that the drain wire was connected on both sides. That makes sense.

I've read people recommending shielded power cords that have either their shield attached only to the component to prevent interference generated by the component from coming out. On the other hand, I've also seen recommendation of shield attached only to the plug at the wall end to prevent the noise going into the component.

How do you decide which one is suitable for a given gear? Are there other problems with these two designs that I'm not aware of?

Again, this is within the context that I have a Torus and I keep my power cables away from my well shielded and twisted balanced signal cables. I've tried putting nasty stuff near my interconnects and couldn't make them sound worse.

Anyone wants to help me understand?

So anyone wants to answer my question from above?

I have 14 AWG running inside the wall. I have a Torus plugged into it with a short 14 AWG cable. If I use short 14 AWG power cables for everything, how am I being limited in power, especially for low power gear.

Sure I get that the power cable is stranded whereas the power line is solid in the wall, but there is no way these components are being restricted in power by extra 6 feet of power cable of the same gauge, even if stranded.