*Assume Mainhand stats for Double-Bladed Lightsabers.

*For 2-Lightsabers, M (Mainhand) and O (Offhand) will be used to preface any stat.

*Stats are after all bonuses from Crystals/Buffs, but without any Feat bonuses/penalties.

*Assume Master Speed is active.

*Assume no Nextor/Opila.

*These formulas only apply to Master-Rank Feats.

Let Hit = 21 + Your Attack Bonus - Enemy Defense

Let AWD (Average Weapon Damage) = (Weapon Min Damage + Weapon Max Damage)/2

.....................

If Higher Hand's Hit < 20:

Double-Bladed Lightsaber:

Flurry > Critical Strike if Hit > 11

Flurry > Power Attack if AWD > 40 - 420/(Hit + 7)

2-Lightsabers:

Critical Strike > Flurry if OAWD > 2/3 * MAWD

Critical Strike > Power Attack if (3*MAWD*MHit + OAWD*OHit) > 11*(10*(MHit + OHit/3) - (3*MAWD + OAWD + 40))

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If Lower Hand's Hit >= 23:

Double-Bladed Lightsaber:

Flurry > Critical Strike. Period.

Flurry > Power Attack if AWD > 40

2-Lightsabers:

Critical Strike > Flurry if OAWD > MAWD/2

Critical Strike > Power Attack if (3*MAWD + OAWD)/4 > 35

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Yes, there is a gap of about 5 Hit between the 2 groups. At those Hit values, different Feats start hitting the Crit Cap at different times, making the whole thing more complicated than what is worth figuring out mathematically.

Note that due to the minimum Hit rate and how Critical Hits work, these formulas don't hold true for extremely low hit rates, either.