I also did some thinking about spells and had some ideas, mostly related to our shadow and inspired by "shadow clones"
I think they become doable after we manage to tame our shadow, because they have some degree of independent action.
1) make our shadow pop up as an intangible 3d figure and fight along side us, wielding our sword's shadow as an oversized shadow dagger (our mastery). It fights indipendently, but has to remain attached, effectively having someone fighting at our back, increasing the difficulty of being surrounded.
2) Detach our shadow and have it move under our direction or and do simple things independently. We can concentrate and assume direct control, which allows us to see and hear (and maybe talk) through it. This gives us the ability be at two places at once, but not act simultaneously.
2b) Teleport using Smoke and Mirrors to our shadow's location, giving a small boost to the effective range of teleportation.
Both would be Fiendishly complicated as a minimum, if i'm any judge.
@BoneyM Are they doable?