You want to write an Icarus(.ibi) scritp whit you enable to the npc to use alf-fire.
To use the script you want to spawn the npc in the GTKRadiant and add.this to thing to the npc in GTK. key:spawnscript value:altfier_script or whatever
i have mor chars with intelligence to 5 and it isnt that. about scripting, idk how to do that and besides i was thinking about using the console like spawning a npc that would automaticaly use alt fire and do so whenever i spawned him