I'll paste the text of the write up, which is excerpted from a faq that can be found in its entirety here (
http://gamerhelp.com/xbox/StarWarsKnightsoftheOldRepublicII/102460.shtml) .
On the three major combat feat front (Power Attack, Critical Strike, and
Flurry), the absolute best of these is Flurry. (Replace with the Ranged
versions if you are using blasters) Why? Because an extra attack is always
more valuable than some minor extra damage to your existing attacks. This
is more apparent at the higher levels when a fully upgraded lightsaber gets
close to doing 100 damage per attack. Let's just say that you do 50 damage,
however, and have both Master Power Attack and Master Flurry.
Note: You can get "up to" 50 damage by upgrading fully just after
Dantooine. That's one of the reasons I go there first, to get
Lightsaber Crystals.
This is an abstraction, not an actual damage comparison. This is just to
demonstrate the differences between Flurry and Power Attack.
Flurry vs. Power Attack
Master Flurry: (1 Lightsaber) Master Power Attack: (1 Lightsaber)
============================= ===================================
50 damage, hit one 62 damage, hit one
50 damage, flurry
============================= ===================================
100 total damage 62 total damage
Master Flurry: (2 or Double) Master Power Attack: (2 or Double)
============================= ===================================
50 damage, hit one 62 damage, hit one
50 damage, offhand 62 damage, offhand
50 damage, flurry
============================= ===================================
150 total damage 124 total damage
Master Flurry, 2 Weapons, Master Power Attack, 2 Weapons,
Master Speed Master Speed
============================= ===================================
50 damage, hit one 62 damage, hit one
50 damage, offhand 62 damage, offhand
50 damage, flurry 62 damage, speed one
50 damage, speed one 62 damage, speed two
50 damage, speed two
============================= ===================================
250 total damage 248 total damage
You can see that in every situation, Flurry is better than Power Attack,
even at the Master Level. Master Flurry has an unnamed -1 penalty to hit,
and Master Power Attack gives you a -3 penalty to hit. So, Flurry is
better.
Note: Master Flurry claims in the game to have no penalty, but it still
has a -1 to attack penalty.
Though Dan pointedly mentions the "unnamed -1 penalty," I believe it only applies to the XBox version of TSL, as checking the combat rolls in the PC version did *not* have that penalty. The FAQ also includes a short discussion of the advantages/disadvantages of Critical Strike immediately after the quoted discussion appears.
****, I'm trying to get the formatting to appear properly. apologies for the inconvenience. edit again: i'm having a lot of trouble with this. if someone wants to tell me how to get it looking all pretty, please do, or if a mod wants to edit it to look proper, please feel free.