Long run XLR cables

100% use Mogami

Mogami gold should be fine for that. 

I am using Blue Jean cables lowest cost XLR's for 18 ft run. They use the same connectors as the more expensive brands. 

Another vote for Mogami gold. It's a fantastic baseline to test other cables to. Mogami also has a non-DIY Platinum version which is a couple gauge larger + higher end connectors

When i work w recording engineers - granted it is a relatively small orbit but growing… i get a LOT of eye rolls when they see the two “ exotic “ XLR cables i bring to the female vocal or Piano microphone selection trial…  ( MIC to Pre > Pre to X )…. Then if the mics are Royer or better…. those eye rolls turn into ;-)… Except when the artist or producer likes studio built Mogami… 

Also…just a bit OFF topic… bring along a great LPS for the other bits in the chain….

Note - the circle i mention are working in the realism zone of audio recording vs DAW synthesis ( this is not a qualitative statement, just clarity )

Of course, i carry Magami as spares / backup - a superb and durable value.