Best Weapons in .Hack//Outbreak

When Data Draining (shortened to DD) you are more likely to get virus cores when blue and rare items/weapons when your status is riskier.

Twin Blade
Kite, Natsume, Moonstone

• Sora's Blades - Return to Lambda Stalking Betrayed Nothingness once it reaches level 70.
• Golden Yasha - DD Black Death.  Bonus boss, only one available.  Sigma Pulsating Sea of Cloud Whale, unlocked after completing the game.  In my experience, you'll need to strip its magical defence with a beast bane and use spells on it in order to get a Protect Break.
• Two Together - DD Stare.  Can be found in Sigma Unusual Soul Alchemy.

Heavy Blade
BlackRose, Sanjuro

• Five Stars - DD Star Viking. Can be found in Sigma Unusual Soul Alchemy and Lambda Stalking Betrayed Nothingness once it reaches level 70.  I had a lot of trouble getting a Protect Break on them.  I found that using darkness spells tended to be the most successful.

Heavy Axeman
Piros, Terajima Ryoko.

• Tri-Tips - DD Skull Devilgon.  Can be found in Sigma Unusual Soul Alchemy and Lambda Stalking Betrayed Nothingness once it reaches level 70.

Wavemaster
Wiseman.

• Heh Heh Heh - DD Dark Maiden.  Can be found in Sigma Unusual Soul Alchemy.

Long Arm
Gardenia, Nuke Usagimaru.

• Minerva - DD Skull Devilgon.  Can be found in Sigma Unusual Soul Alchemy and Lambda Stalking Betrayed Nothingness once it reaches level 70.

Blademaster
Rachel, Marlo, Balmung.

• Phoenix's Fire - DD Lich.  Can be found in Sigma Unusual Soul Alchemy and Lambda Stalking Betrayed Nothingness once it reaches level 70.