Scroll writing.
In my view due to OP problems this should be a limited activity in the sort of spells you can use. Since most this stuff will probably be already available on shops. It should also be very very easy to use/create.
Skill: Write
This would allow you to put a non blocked spell from your spell list into a scroll. It would consume a single raw material. It would lag the writer a bit.
Rare spells lag more and require a special raw material.
Spells allowed:
Cure blindness.
Cure poison.
Cure disease.
Poison
Plague
Blindness
Cure light
Cure serious
Heal
Armor
Shield
Stoneskin
Flesh Armor
Sanctuary backpack /10
Energy Drain
Weaken
Lightning bolt
Chill
The scrolls would only have 1 spell. At mastery you could put 2 different spells in the scroll and cost 4 times the materials.
(Heal+ cure serius, Plague+blind, armor+shield, ...)
Spell level is character level multiplied for his WRITE profeciency divided by 100. L50 at mastery, L40 at 80% and pinacle.
scrolls need vellum.
Other scrolls need shop bought paper. Paper costs 100-500 gold.