While using other mods that have right click actions bound to right clicking with a weapon or tool, Spell Engine seems to override it and block their actions.

Would it be possible to allow the user to choose which key cast spells?

Hello,

Reassigning spell casting from the use item hotkey is not possible.

FAQ on Discord:
Weapons with a right click action, now conflict with automatically assigned spell casting feature. How can I fix it?
You have multiple options:
A) Disable automatically assigning spell casting capability, set "add_spell_casting_to_swords": false (in config/spell_engine/server.json5)
B) Add the specific item, or the all items from a mod to the related blacklist. "blacklist_spell_casting_regex"
The blacklist is a regex. It is matched against item ids.
Example: to disable all weapons from banana and apple mods, use: "banana:|apple:"
Example: to disable a weapons with the following id orange:orange_sword, use: "orange:orange_sword"
C) Disable spell casting for a specific item using data files https://github.com/ZsoltMolnarrr/SpellEngine#%EF%B8%8F-disabling-spell-casting-capability-for-weapons