I can easily set this to unlimited, I will check on this.

Just a note for anyone wanting to play as Eltharion High elves on SFO in combination with this mod (the magic part of it), if you try to use the Wardens cage ability it will have the vanilla 25 second use rather than SFO's unlimited cage duration in battles regardless of load order.

I want to be able to choose spells for such magicians as mazdamundi and teclis, kairos as in the desktop, because right now they have a so-so set

The better thing to go would be to create a Mage Character who has the 5 best spells for battle from the 5 best lores of Magic. This would be easier to do than give a character access to all spells from every Lore, and then create a way to make them switchable... thats a really long and intense mod and testing phase.

They work around this by allowing you to pick multiple Mages, from different Lores as heroes, and then allowing you to bring more and more Heroes as a campaign progresses, only problem is all of your heroes are working with the same pool of magic.. (which brings me to my next mod)

The complexities of custom character design for the Lords and Heroes, and the limitations
of the Battle UI and the character UI, would make this mod extremely difficult to produce because it would literally require an entire reworking of both the UI's or a select-able switch option of some sort allowing you to pick which spells are equipped for each battle. The UI in it's current form allows Icons for only up to five special abilities (including those given by Items) and five Spells from their Lore of Magic.

I'm waiting for a mod that will make it possible for the magician to pick up all the schools of magic

This mod is designed to synchronize with my latest mod: Return to Glory: Apocalypse>
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2879125233