I've liked novels which have a Parallel world for the MC to build up strength in (as a cheat of sorts). Examples include Commanding Wind and Cloud, Hail the King and Silver Overlord. Are there others that exist that are similar to this?
I highly recommend "nine hegemon body art". The mc is fearless,domineering and even the heavens are his opponent. he treasure his friends and he makes them strong too.
City of Sin has this concept of army building and worlds travle there are few thing i do not like latter in that novel but it is fine... Spoiler: The Negative like Science-Fiction elements in a first to see magic and sword world...an tragedy aspect as i remember it but 2/3 of the story itself was fine for me
The Sage Who Transcended Samsara It’s pretty early on that Spoiler the infinity genre, which is inspired by Terror Infinity, comes into play. In this case it’s focussed on martial arts, inheritances, and growth through life and death battles
I was reading that and found it great but when I realized what happens to the priest (dawn or something) that is part of his harem I dropped the series
How about Quick transmigation : mysterious boss ? It's not in NU Or, Crossing to the future, its not easy to be a man. World apocalypse online, is good too.