Just with a brief revision of the entire story people with the most basic mental faculties intact can surmise that both "geniuses" are actually colossal idiots. Now that might come off as offensive to people who suspended their disbelief in favor of having another "awesome show" to brag about but no, I won't even accept people who would dare call it a "guilty pleasure". This story has plot chasms, not holes.
Just to prove my case, this passage will contain some spoilers: why kill Nanao as your first victim? The most naive out of all. The most harmless to Nana herself, since he dispels powers that she does not possess. Actually the most useful to her since, you know, she, later on, whines about being at an impasse because of that invincible dude and so on? Now I don't claim to be a genius but maybe you could have used Nanao there? Oh, what are you screeching there? He comes back? How convenient. Maybe let Nana use her genius the first time around and prove to us that she is what she preaches? How about finding out all the abilities first before starting the spree in case someone has a clairvoyant ability so that you don't jeopardize the entire mission? Ah, wait, there actually was somebody. Good thing plot convenience struck again and made that guy a nutjob. Geez, it's almost like the characters are forced into their "genius" roles by the clearly visible hand of the author instead of showing us their intellectual prowess themselves...
Now I'll stop there and make this short: I was just as psyched to enjoy this show, but unfortunately, the author was not as enthusiastic whilst planning out the plot to make sure his characters could function at their maximum capacity within the context of the story. The immersion is thus broken, and the viewer is left with the unengaging smithereens.
