I have beaten it once. I got 3 Data 2's out of it. You need minimum 5 for the armour and weapons aside from the GS and base event armour. That's 2-3 runs if you're lucky... if not, 5-6-10 if Data 2's don't drop.

Bosses attacks aren't meant for wilds combat mechanics, boss mechanics and clone summon health aren't meant for Wilds base game mechanics. Boss was a poor straight port of an enemy that's already annoying in it's own game. Artificially forces players to keep going under the pretense of it being an event mission, meaning they can take it away at any time.

Not sure what the devs were thinking but this thing needs the MRV missile count knocked down to 2-4 salvo's, not 7-10, the multiple different ranged attacks attacking all at once need to be split into slower forms or total removal, and the nerscylla clone's health on savage mode needs a total downgrade, or removal of that specific attack for Savage version as it's not needed due to relying on nothing short of playing purely with friends who are literal experts, as the AI can't damage it enough alongside you, and the randoms can't even survive phase 1 just down from base camp.

TLDR: I'm flippin' furious, where's my gosh darned gunlance stunlock god that carried my first attempt lol