Grimoire in off-hand, sickle in main hand.
The grimoire would give me spells that have low damage, but high utility - subterfuge spells, or spells that would leave my enemy stunned or vulnerable.
I’d have the playstyle of an opportunistic assassin, but with enough magic at my disposal to create my own opportunities
It’d be slower/lower DPS than either a full assassin or full spellcaster, but also less risky. I also feel that it would match the “respected, but never fully trusted” image of the Cerim.