Sorcerers have been here for a good while now, but they still have very limited utility aside from crafting spell pages, which themselves have very limited utility. Just spitballing ideas here, but I think we can add some uses for these lazybones.
1.) Transport Stones: Sorcerers reduce the amount of corruption you receive for using transport stones and/or shorten the amount of time a character has the tainted debuff. Reduction scales with tier.
2.) Circle of Power: Sorcerers reduce the amount of resources needed to cast spells like summon mount/corpse, etc. Minimum 1 for resources, and reduction again scales with tier.
3.) Shallow Grave: Sorcerers provide small to moderate buffs to crafted zombies. Thrall tier will increase the buff and/or offer buffs to additional stats.
4.) Alchemy Stations (firebowl and bench): Sorcerers offer unique recipes not available as base recipes or with Alchemist thralls.
Sorcerous spell pages: Can be used in place of corruption for casting spells. Each spell page reduces the necessary amount of corruption by a certain percentage.