How are y'all hitting 400k+ with c0r0 Mualani?

Im currently using RoY on her, Kaz and Xil are also c0r0 with Fav and Cinnabar respectively. XL is c6 with the catch. I sometimes see showcases of Mualani with lower hp/cd but somehow they're able to hit really high damage. Am I missing something? Her talents are also crowned.

I have Furina c0r0 and unbuilt/unleveled c5 Candace btw if the team comp is a huge factor.