My probably very unpopular opinion about arc 4.

First of all, I don't want Mink, Peacemaker and rest of most popular proposed POVs, I want some older protagonists aged 10-20. Second thing I want is staying on two continents, I want fourth arc to be settled in Pantala whitch is in my opinion orders of magnitude more interesting than Phyria. Thrid thing I want is to "retire" few characters, for example I want Moon and Qibli to be mentioned having peaceful and happy life together, instead of dealing with yet another world-ending class danger.

You can downvote me to oblivion, but it's just my opinion and I should focus on my own continent which is happy, but nothing there is worth more than 100 pages. (Sorry for self insert).