These decks are designed with a first-time run in mind. Once you've gone through the game and gained some better cards, feel free to switch out Slashes with Heavy Attacks, Durandal's with Elysions, and so on.

Sword x 3
Saber x 3
Mechgun x 3
Mag x 2
Slash x 3
Stab x 3
Assault x 3
Spirit Boost x 3 (AKA Split Boost)
Guard x 3
Dodge x 3
SA Guard x 1

Strategy: Get as close to Pollux as possible, you need to advance quickly to get in some blows before she starts her Penetrate attacks. Once you get up close, go all out. Basically, just Berserk her. Against Amplum Umbra, just keep plugging away at him, and keep away from any enemies.

Mechgun x 3
Wals MK 3 x 3
Rifle x 3
Mag x 2
Slash x 3
Stab x 3
Assault x 3
Spirit Boost x 3 (AKA Split Boost)
Guard x 3
Dodge x 3
GN Guard x 1

Strategy: Same as Sil'fer, but since you have a little range, use it and save the couple action points. It'll be a little harder than with Sil'fer due to the reduced AP, but with a Wals out, you should be able to get some good damage in.

Wand x 3
Club of Zuriman x 3
Mace of Adaman x 3
Vayu x 2
Foie x 3
Zonde x 3
Barta x 3
Guard x 3
Dodge x 3
CN Guard x 2
Reduction x 2

Strategy: Again the same, but this time you're using techs. Makes it easier to do damage due to the lack of tech defense Pollux has, but harder due to the reduced damage from lack of Assaults and Spirit Boosts.