I just had a nice encounter with Medusa. Unfortunately I didn't survive it.
This fight seems quite a bit nastier than the other legendary creatures I already killed. The beam she casts seems quite deadly, and while I didn't test it I assume it'll turn me to stone if I stay out of cover long enough. But the most dangerous part was the other attack, three circles on the ground that don't need line of sight. They did hit me rather well while I was hiding behind a pillar, and I didn't manage to avoid them often enough.
The thing that killed me in the end was that I ran out of adrenaline, and couldn't refill it to heal.
How can I defeat Medusa? Any particular tricks, or any tips on how to avoid her attacks?