I'd probably do #2 if I was you, but it really depends on how often you see these rogue kanji. You could just copy/paste the stuff into a temp document before you make the actual card-- don't see how that'd slow you down all that much from the "look it up" step.
Anyway statz after today's run (still owed a double-- maybe later tonight):
Card Maturity
Mature cards: 31 (0.9%)
Young cards: 89 (2.6%)
Unseen cards: 3267 (96.5%)
Correct Answers
Mature cards: 0.0% (0 of 0)
Young cards: 73.8% (166 of 225)
First-seen cards: 77.5% (93 of 120)
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No problem!
This is a cute and pop genocide of love!