Get 2 or 3 people with 200%+ pump-shotguns, get on top of the yellow mushrooms. The boss will be unable to hit you. Recommend that you have a stegosaurus or turtle to by some time to get on top of the mushrooms. If you don’t have tek suit unlocked I recommend taming a low level Procoptodon (Giant Rabbit) to jump onto the tallest mushroom. 😁

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