loving to read. that's all. Thank you for your hard work.
Another problem is his reluctance to change canon plot. It is like those Harry potter fnafiction where the main character won't liberate sirius, destroy the horoxuxes until the golden trio does it. I understand that in HP it break the plot and make the mc OP. Here there isn't such problem, the secret of the original plot are not that powerful. To not change the timeline when there is obvious advantages to it make the mc look stupid, the plot reheared and the author's intent obvious.
They could move the viper school in a secret location in novigard. One they would have as much street kids they want to turn into witchers. Two it would suit them as they are more human killer than beast. Three they could work with the northen kingdoms better from there
Mc is way too OP. Like every OP character it make it hard to have true antagonist. The order of chapter is a mess, dobby was under his order before his house elf. He has no difficulty in any magic he attempt, the theory behind it is childish.