One little trick I've discovered is to use Elma as the main character and use the
Shadowrunner Art. It requires TP to use, so you'll need to build that up in some manageable fights beforehand. However, by locking onto a dangerous enemy and activating the art, it prevents any form of enemy detection, allowing you to slip past fields of detection enemies with ease. I made use of this little trick to nab that Comm device item for a quest in Primordia being guarded by some high level Rexes.
To make sure it works, target an enemy at a safe distance, activate Shadowrunner, and immediately put your weapons away by pressing B. As you're running, you made need to occasionally lock onto a new enemy, pull your weapons out, and then put them back so that you reset the battle AoE zone.
Hope this helps out some fellow explorers.