Continue to follow the light beams, while defeating the many Thexterons and Frag Leeches until you reach a new enemy: the Vespid. The only dangerous ability they have is Flurry of Fire which is rarely used though they do have high HP. Treat them as you would any other enemy. Alpha Behemoths still pose a challenge but with Lightning’s new Launch ability, you can Stagger them and then juggle them by timing your attacks so they never hit the ground.
You should also be able to see a barrier with a Treasure Sphere and a Behemoth behind it. You must run all the way around the hexagonal path to reach it and when you do, you will be rewarded with 3x Antidotes . Next, follow the marker to the next elevator.