Best Back up record option

Looking to supplement the built in stream record option with an additional for back up.

Wondering what might be the best option and least load on my system. (2017 15” MacBook Pro)

NDI to another macbook using Sienna NDI Recorder


Blackmagic Ultrastudio Mini Monitor to an Atomos Shogun or BMD Hyperdeck


Ive been using a Ultrastudio to Blackmagic Hyperdeck so it records in ProRes and is a hardware backup.