Get close to Miranda from below. If your speed is 3000+ and you are able to deal critical damage with a single hit. 

This macro easily skips all dialogues and activates your chosen skill, which can instantly destroy the enemy. It works on any difficulty, as long as your attack can actually kill the enemy with a single hit. 

For example: with difficulty at zero, magic over 10,000 (for example, using the Demonic Catalyst + 5, the maximum level in the Hattie Covenant and suitable items to improve magic), a speed of 3,000 can be achieved using the Souls of Node or the souls of External Gods from the dungeon of Chaos, respectively, attack with Heavy Soul Bolt. I also recommend having a mana recovery item so you don't get distracted.