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Hmm... there are a few more considerations, such as how the spell lists are loaded in for standard character magic and lores. There are also spell animations to take into account. If I were going after this, I'd leave the spells exactly where they were, but swap their effects and animations, which sounds like it might be what you're doing.

I'd also leave Aqua Rake in place and replace Cleansweep. A couple reasons for this:
1. Aqua Rake is water/wind, making it a better fit for Lores. Cleansweep is water-only, making it a better fit for Black Magic.
2. Aqua Rake is specifically meant to get you through the burning house in Thamasa, and highlight how good Lores are.
3. The animation for Cleansweep makes it look like a high-level spell along the lines of Quake and Merton. I would rename it Flood, up its power to make it a 4th level spell, and give it to a late-game Esper.