Hoo boy. Um...what are your criteria? I'll set about gathering a rough list of the good gen I've come across, but the vast majority are KandaAllen, or LaviAllen, or Allenalee, or something along those lines (almost always involving the Fab Four and/or Tyki and Road; the less popular characters tend to lurk in the sideships), so which pairings are preferable?

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