Nice! Seems like you have thought out a lot on this !
We are developing something similar may be not on the scale you are envisioning.
My doubt is all of these are like powers so how do you plan to manage that in UI. To show a player having like 75 spells and choose which one he wants to use?
Would be something like player can only carry with him a few of spells instead of all he has discovered or something.
Best of luck.
Thanks for the feedback! The large number of spells and skills will be managed with a UI similar to the original Neverwinter Nights and Dungeons & Dragons Online, and also take inspiration from the UI of more modern games. Players will have access to a menu with all their books, where they can open individual chapters and either cast spells directly from there, or pull spells into a hotbar for easy quick-casting. The hotbar could allow 30+ spells by utilizing the numbers 1-9 in combination with other bindings such as Shift, Ctrl, Alt etc, depending upon the keyboard setup.