One clever trick that Cari has done in Eternum was to make the girls a team. This way he can have both 1:1 scenes for the girls that are the stars of the episode and 1:M scenes for the girls that aren't, and he's not narratively limited by the implausibility of the combinations. This makes balancing the screen time between the girls much easier.The main things I would criticize is the "magic system", the girl distribution (some get more screen time than others), and the over usage of Stabby Mike as a Deus Ex Machina. Most of this is alleviated GREATLY in Eternum even though it isn't quite gone (looking at Penny, Dalia, and Annie don't have enough screen time or just plain blueballed)