Are you kidding,, C rank dungoens and going without a healer ? Suicide!. Sure you can be good, well organized, great teamwork. But you need at least 1 in case of accidents or emergencies. You can plan well, but nothing ever goes perfect all the time. Unforseen problems can occur. Do they really have to learn the hard way ? or maybe they wont learn when they have a wipe.
I was going to chew the MC for being an ass to the kid. Obviously hes from a rich family and could tell it was his first raid (his armor and shields still shining and unscratched , is the give away). But MC said something decent to him at the end. So I'll cut him some slack for for now.
As for the MC, sometimes it seems like hes smart, then he goes and says something dumb or just ends up being slow. Isnt it common sense to go into a dungeon "equipped" Just cuase he goes in bare hands, doesnt mean every else has too. You'd want to have equipment and tools when your life is on the line. The more reliable the better. Maybe he should raise some intelligence. Hes been doing his dungoen raiding wrong alll along. So while he says dumb shit time to time or being slow at it . Then he say smart stuff like about the warning about insects, he seems to know everyones roles like hes some tactician. Hes like a commentator whos explaining everyone roles and how the operate. So he does know some shit ? confusing.