So first of all, Book four done out of planned six books? Personally , I think this is a mistake. I know the author wanted to do six books since near the start or maybe since then but due to the pacing and the evolving story, that seems like a waste or rushing the last two. Four books just to get done with prep, now we only get two books for explore Ren's life and future? Unless he dies in book six ending abruptly, this seems like a let down. We won't even get to see how Ren's skills develop, he's only Rank 2, we won't ever see him Reach rank 9 or 10!
Also this is a good story, while there are flaws with pacing, if the author wants to do only 6, with say a 20 book series, the pacing is fine even if the books are a tad short. 200-300 pages might be average but with this placing 400-500 would be better for each book. The characters are unique with their own personalities, too many books have characters who are super similar with just some quirks, with this, each of them is their own person.
Now that all aside, The book itself was fun, no real slow parts , all engaging and great interactions. Fun to read if frustrating that Ren has given up what used to make him great. He became such a 'genius' because he kept thinking of new ways to use his Rank 1 skill and energy manipulation to his eyes and how to use it with his skill. This is pretty much forgotten once he got rank 2 , he doesn't seem at all to try to use energy WITHOUT a skill to just power his body or arms. We see him try 'jumping' but never find out the results. It's a shame really to see him not constantly trying to find new uses for his affinity , instead focusing purely on his skill and tournament.
I personally had hoped that Ren would understand that skills are 'shortcuts' or 'hints' at what the affinity could do but not focus. That seems to be the mistake everyone makes, and why most get stuck doing the same thing over and over, like Ren is starting to. Skills are basically premade guides to show a function of the affinity but TRUE users of it, focus on the affinity itself and applications of it, not the skills and end up making their own skills. Like Lin who makes shackles sure but also made dark blobs to block sight and disorient, A true user of her affinity, not reliant on premade skills by the goddess.
Honestly there was so much he could do with WEIGHT, that I hoped for more. The fact he seems to just fall on and squish all his enemies most the time is a let down. That's not going to work when the enemies are 5 times his size or have powerful claws to tear him in half. Four books in and he's still focused on the now and not the future, no planning. No thinking of how he wants his affinity to progress to fight all types of monsters in dungeons, not just ones he can lay on.
As for unarmed combat? He wants to be a dungeon diver. Does he not realize blunt weapons such as fist ruin hides , meats, organs , bones and all the valuable stuff from monsters? Pulverizing flesh ruins hide for armor, as well as everything else. So no, unarmed combat is stupid for his given goals. Which he's making no thought towards.
I had hoped for him to think of stuf like increasing his weapon's weight to make it swing heavier or his arms to get more weight behind the downward strokes. Perhaps try to learn area of affect things to make zones that slow enemies or crush them due to heavy weight, or light weight so he could rush around the battlefield.
Then they mention enchanting and I was like oh, he's going to realize he can use his increased weight skill to put that on a weapon and have a weapon that increases it's weight at the last minute and slams into enemies, like his axe. Nope.
It just seems every unique and fun idea of what he could do with his affinity and it's applications is tossed aside for ...laying on his enemies. A paperweight. Some might think this is the author being lazy but I don't, since we've seen unique skills for others, like Jen. It's literally just Ren not thinking outside the box and being stuck on current goals and not the future. Even though at the start he was the one to think most outside the box and apparently great at thinking of skill variations for others, just not himself.
While this is all fine if they were going to develop the series to slowly build up to that, again 6 book and were on 4. So clearly not happening, which means disappointment. Hell even a the simple jump real high and crush like boulder idea was fine until it showed it hurts him too to fall while heavy. Even his heavy punches hurt him, so clearly need more unique applications.
So while this is a great series and I recommend reading it, I'd say it's wasting tons of potential. we've barely scratched what Zane can end up doing, where the others will grow. The adventurers and stories they could have of dungeons, war, exploring other lands, gaining new skills. Joining the guilds, treasure and fighting evil merchants. To see Ren learn about skills and affinities and teach others, perhaps learning how people gain affinities as well. All of it. Tons for this series to do but ...four out of six books done and we just finished one year of prep. I hope the series ends good but honestly. I can't see that happening without it being extended, unless were going to end Ren's story and focus on others with more books but even then that's a super let down as we've spent so much time on Ren and his growth.