The story is pretty good, strength progression is decent and makes sense. Honestly, my only problem with this fanfiction is that MC is a psychopath, he doesn't care for anyone, they killed someone with whom he had been with him in a lot of life-threatening situations, and he acts like it's just another day, I just can't help but feel disgust to him. I mean, if his reason for getting stronger is to survive, being a jonin is more than enough, let Naruto and Sasuke do everything and hide during the War.
Sorry, but I can't enjoy a story without feeling some sympathy towards the MC, at least in Reverend Insanity Fang Yuan has a goal which kind of requires him to be like that, this mf doesn't.