The question now is how to lock in your Sneak Attack Damage? I think my recommendation is another 1-level dip, this time into Arcanist. It will give you a much-needed +2 to your Will Saves, and the level 0 and Level 1 Spells will be a lovely utility, as will the ability to use any Sorcerer/Wizard Wand. But the real reason I want you to...
These are great recommendations, this method sounds very fun. I appreciate the advice, I'd love to hear more of your ideas and tricks as well.