This is a middle schooler's wet dream kind of manga. Unfortunately, not very good for anyone older than 12. It's so pathetic and cliched. Typical of a lazy author trying to get by on a type of story that's already saturating the industry because he's can't think of anything original to write...
So far it's the most generic and cliched of this type of story. Let's see if the author decides to start working or if he's just cashing in on being lazy.
He actually yelled, "Power of friendship!" in the middle of battle. Unironically, since this isn't a comedy. That's the level of story you're getting if you decide to waste time on this.
At a certain point a story loses it's meaning and becomes worthless. I think in this story it has to be the second time he travelled back in time to avoid his death. Even if plot armor is a thing, there's just no point to a story about a kid becoming the strongest mage when it's literally...