While launchers aren’t everyone’s cup of tea, it’s worth having at least one in your inventory in The First Descendant. Luckily, you don’t have to grind for Ultimate launchers, as there’s a powerful rare launcher called the Vestigial Organ.
UPDATED BEST GLEY BUILD! (Bossing & Mobbing) // The First Descendant Gley Guide
The Vestigial Organ is a rare launcher with one of the highest damage potentials among launchers. It’s easy to get and even easier to build, so here’s our best build for the Vestigial Organ in The First Descendant.
The Vestigial Organ's Module selection is somewhat limited. You don't need Critical Hit since its base Critical Hit Rate is only one percent. You can build Weak Point Damage on it if you're confident you can hit enemy weak spots, but beyond that go for basic offensive stats like Firearm ATK and stats that increase attribute damage.
Here are some recommended modules for the rudimentary organ: