can't beat the fearless lava dragon because I only have c0 chev and my raiden/xiangling artifacts suck, but learning about the c6 chiori + c2 chongyun interaction made the whole thing worth it
>Chiori E CD is 16s
>Chongyun C2 cuts E CD by 15%
>Chiori E CD is now 13.6s
>Chiori C6 cuts E CD by 12s
>Chiori E CD is now 1.6s
this has to be the most fun gameplay you can achieve in genshin