Finally.... I DID IT!
First try with the Faith build using the Blasphemous Blade and the incantations that boost resistance against holy damage and boost attack/defense. Taker's flame made short work of Radagon. The second phase was still hard even with this OP build. But I'm glad because I really earned this victory, unlike against Malenia where it felt a bit unearned. I still had to run for my life and dodge at the right time and struggle with the camera and keep a cool head and hit with everything I have. The EB is really one of my favorite bosses in this game and all games that I played recently. Despite it being so hard I love its design, music, and moveset.
So I went for the Age of Stars ending, glad I did cause the others are even more barebones. After 110 hours I expected something a bit meatier. Guess I'll fall back on the lore YouTube videos that explain each ending.
Thank you so much guys for your advice. This was an incredible journey. One of the best games I played in recent years. Can't believe how huge Elden Ring is, and I played Breath of the Wild earlier this year. The beauty of the environments, the dungeon design, the memorable bosses, the deep lore, the uncompromising game design philosophy, the possibilities for building your character, the NPCs, all of that was captivating from start to finish. Of course it has some imperfections but that is totally acceptable. I'm proud to have triumphed over gravity, the camera, and the bosses.
Mephisto40
my internet speed is too slow to summon players unfortunately.
Fake
I didn't feel like fighting Alecto a dozen times just to use him for one boss. The mimic tear proved a reliable companion all the way to the end.
I look forward to playing Dark Souls III after taking a break.