ELDEN RING Radagon (No Cheese - Fallingstar Beast Jaw - Black Knife Tiche - Read Description)
Phase 1 - I went with high defense and block ability (some of his attacks were tough to time even with a fast roll) Immediately start by summoning Tiche (her high evasion and high damage range attack that scales with the bossed hp is key). Maintain mid distance, 3 to 4 special attacks should stun (but he recovers fairly quickly). Bounce aggro back and forth between you and Tiche, and attack when the openings present themselves. Heal up and get FP full before cutscene.
Phase 2 - Immediately attack with 3 special attacks (don't run away). Boss should respond by using its breath attack, run behind it (or at least enough to the side to avoid the attack). 1 more special attack should stun it , move to its body and land critical hit. Try and get a few more hits in before it dives away. Close distance asap. If boss flies in the air and a circle appears, run away from it and look for the circle on the ground. Jump over it as it approaches and avoid the aoe. Quickly locate the boss and close distance (you don't want to be too far away as that causes it to do this sword wave attack that can be tricky to dodge). Look to land 1 special attack in between its attacks. When the boss release a bunch of gold shards just run and and stay in the general area of the boss. The shards don't do much damage, they are mainly a distraction for some other high damage attack. Within another 3 - 4 hits you should trigger another stagger. Land another critical hit to its chest. Hopefully Tiche is still alive as her damage in this phase is really melts the boss HP pool.
Key Items : Fallingstar Beast Jaw + 9, Carian Knight's Shield + 25, Black Knife Tiche + 9, Great-Jar's Arsenal, Dragoncrest Great Shield Talisman, Radagon's Scarseal, Greatshield Talisman