It’s a ok team up, Razor is a physical dps so someone like Xinyan would be better. Sucrose is good for elemental damage but she’s much more for teams that use character that do lot of elemental damage. Plus you still need a healer if possible since Razor will stay out a lot. Kaeya is good due to his burst which you can get superconductive to lower defense. So I would take Xianliang and Sucrose and replace them with a healing and a different elemental support character.