I've been reading Feilu for seven years, so you can trust my recommendations!!
The first book has no protagonist, but the author's writing is good enough to make it worth reading.
The second one is well written.
The third and eighth books are by the same author. Highly recommended, and very much to my taste. There are quite a lot of factions from different worlds, which some readers might find confusing, but the author keeps everything under control. There's a lot going on, but it never gets messy, and it's really fun.
No need to say anything about the fourth one. It's a classic in the sacrifice genre.
It's a shame about the Silver Superman book. It was pretty good, but it got abandoned.
I won't go into the others. They're all decent. The Super Dimensional Guild is an absolute classic, and it was my gateway into chat-group stories.