Esporter here.
Leizi pros and cons vs Mlynar
+ Leizi S3 shits on large bosses, Sui melts in 10 seconds
+ Leizi S3 shits multihit checks
+ Leizi S2 is basically a larger range Mlynar S3
+ Leizi cannot be hurt off skill
- Leizi S3's lightning balls can't hit air
- Leizi S2 cannot go over walls unless there's a path
- Leizi S3 only goods against low res

Overall, an excellent designed operator which does not powercreep but provides alternate uses.
https://www.bilibili.com/video/BV1HkGJzzESn/ This video shows everything off like Sui dying in 8 secs