And if I'm being honest. MC fighting and nearly dying every time to evolve is just repetitive writing. Yes, near death experiences during battle is a good trigger for evolution, but it's not the only one. So having MC do that for every single evolution is repetitive.
You're right, as epic as it is to evolve in battle, it becomes repetitive
So, if we're betting, it's in our 4th evolution that Mc will evolve in another way, and the golden key, all the memories of our childhood are the biggest possible trigger we have now, or maybe, Mc will fail, and end up turning into a monster, having to go through something like Deryl, or more possibly being used as a guinea pig by Hero...
Of course, Mc has no chance against Indra, the greatest of the Chosen and the only one who might have a chance against Bernhardt, of killing Bernhardt, because, although it seems absurd, we haven't seen anything about him, we don't know the real extent of his strength, only that he uses a sword and a red ray, something that I doubt are his only abilities, being a Chosen, his power is beyond an S. However, it would be interesting to see a clash between Mc and Indra, after recovering his memories and discovering his Mother's murderer.