Promised Consort Radahn is challenging due to his relentless offense, varied and lethal attacks, and the fact that he doesn't give players a chance to prepare. His second phase adds even more difficult moves to his repertoire, making the fight a true test of patience and skill.
In multiplayer mode, when fighting against Radahn, his health increases significantly with each additional player joining the battle. This makes the fight more challenging as the players need to coordinate their actions and deal enough damage to overcome the increased health of the boss.
Various strategies were attempted to defeat Radahn, such as using spirit ashes and NPC summons for distraction, focusing on applying status effects like Scarlet Rot and Bleed, and utilizing defensive gear and talismans for increased damage negation. Additionally, parrying Radahn's sword attacks and dodging his powerful Holy attacks were crucial to surviving the fight.