Finally got around to unlocking all the modes and updated my previous posts. Events get funnier and more ridiculous with every mode, especially the intro cutscene. Virtuoso/Archmage intro is the girls communicating via cute animal noises. I'm not joking.
This post has a step-by-step guide to unlock Wizard from scratch. Should be even easier with NG+ stats.
This post has mode unlock and ending conditions. Use it with the guide and you can open Virtuoso.
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can be put through Google Translate to answer the quiz for a free +10% to carry-over stats.
With Virtuoso open and the quiz done, that's 70% carry-over stats, which is more than enough to out-grind Viola in the CMT for those who can't be bothered with AI micromanagement. Start the battle with Regeneration and Ice Wall, then auto-battle to victory. Use Tempest, Dark Despair, or Effusive Light to wipe her summons and remember to bring Drain Essence on Secret to restore MP.
If you ever want to use a specific skill asap, set all tactics to Never, set Targeting/Positioning to Any, set the desired skill on Secret, then toggle Secret on. In fact, you can make the game much less random by keeping tactics that way and just setting skills to Secret.
For those curious, here's what my starting stats look like as of around NG+10 with 88% carry-over: