I just finished 灰と幻想のグリムガル level.4 導き導かれし者たち | L31 and there was CPR in here as well. It’s indirectly explained that healing magic doesn’t work if the heart is not beating AND, in the case of モクゾー, the magical buff from メリイ ran out while he was already running on fumes, so it’s implied he died of shock on the spot. So it’s not like he was just barely tipped over the line, he was dead-dead at the time.
In terms of writing, I thought this volume was better than the previous ones, but not beyond what you would expect from the author getting more experience. I started volume 5 as well, but I haven’t seen any major change on that front either.
I liked that battle, by the way, since it really showed how much the range of actions of the party (and their enemies) has expanded. I also appreciated that there was a realistic build up of desperation, followed by a clear shift when the characters are clearly getting the upper hand, but are not done yet and are one mistake away from a total wipeout. That really contrasts stuff like dragon ball Z or ダンジョンに出会いを求めるのは間違っているだろうか | L33 and the like where the characters keep getting up no matter how many damages they have sustained (same for their opponents) so that you just don’t feel any tension anymore (and it just end up feeling boring and dragged on).
I meaaaaaan, someone is getting jealous despite trying to restraining himself 
. Also, I do agree with him that they are not in a situation to have a romantic relationship going on. That could add unwanted tension, leading to the death of everyone.
