Ok, back to the 999 HP Leo file with two more sets of tests: Other, Woman, Leo; and Other, Leo, Woman
Pre-Phase 1: Another stone? (he still says "We've been through a lot, but...Eh. Might as well drown em' all.), be with Leo forever.
Phase 1 Actions: Shaams, Diemazu (tired of getting bodied from the 2-shard less than 100 HP tests, so -1 stock. :D), Shaams (sigh...alright...I'll wait), Diemazu (crap...sorry Tsubaki), Diemazu (sorry Angle...), Diemazu (really?), Diemazu (I'm thinking this is #3...otherwise I would have seen a Marigan by now and he wouldn't be as squishy).
Result: First spreadsheet, Likely 3 or 4. Probably 3 since the game never wants him to use Shade of Kada...maybe it's bugged...
Pre-Phase 2: Woman's shard.
Phase 2 Actions: Shadow Servant (Variation 6 giveaway, time to go home now...didn't quick one-stock him...), Suction (-1 stock), Halting Blade (done, -1 stock).
Result: 6. Moving on.
Pre-Phase 3: leftover choice by default, Leo's stone.
Phase 3 opening line: "My only desire...is for humanity to finally awaken..."
Phase 3 Actions: Crimson Flare, casting (-2 stock as usual), Vermilion Sands (Vermilion Nope).
Result: Second spreadsheet, Variation 4
Conclusion: Arbitrary stuff is arbitrary, I guess. Perhaps having all but two shards drowned in the first phase lead to two of the stronger forms, but that doesn't explain getting an easy form on the third phase (then again, nothing logical explains getting different forms on the third phase).
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Pre-Phase 1: Another stone? (he still says "We've been through a lot, but...Eh. Might as well drown em' all.), no strong enemies.
Phase 1 Actions: Uzume (shall I body him now or wait? -1 stock), Marigan (body him now. -1 stock).
Result: First spreadsheet, Variation 2
Pre-Phase 2: Woman's stone.
Phase 2 Actions: Light Servant (early giveaway, thank the Celestials! I didn't need to deal with Tech de Jesus again...) (-1 stock), ??? (Thousand Blades, he's blocking like everything!), Dual Whirlwind (not anymore, -1 stock, gg)
Result: First spreadsheet, Variation 8.
Pre-Phase 3: leftover choice by default, Leo's stone.
Phase 3 opening line: just growls while breaking out of his rock, nothing else
Phase 3 Actions: Crimson Flare, casting (-2 stock, almost -3 in one round!!), Psychokinesis (I think I'm experiencing deja vu. Oh well, -1 stock, gg)
Result: Second spreadsheet, Variation 1
Conclusion: 2, 8, 1. Every easy variation. If you're having problems with the Firebringer, use this Shard combination. The only issue is Lissa's wish: it will give you the "bad" ending (depending on how you view things) unless Lissa is your #1 most used character (not including Leo himself).