Let's break Xanathar's!

[Mikal]

What I'm calling the Unlimited Power Insomniac Sorlock (starts coming together around pages 3-4
From consensus, Hexblade Tomelock 3/Divine Soul Sorcerer 9/flavor the rest to taste (I prefer Paladin for smites) for now

Take some days off or at night during travel time, come back with nigh infinite spell slots to use to cast well... anything 5th level or below, or convert to SP for metamagic, or smites as a Paladin.