(Not updated for 1.2.0) Acrobatics, Vaal Pact, Phase Acrobatics, Ondar's Guile.
Link to guide includes level progression, budget version, Character breakdown and much more http://www.pathofexile.com/forum/view-thread/852727
(Not updated for 1.2.0) Resolute Technique, Iron Reflexes, Unwavering Stance.
This is a explosive build for the marauder: It utilises infernal blow with melee splash Leap slam to manouvre around The build is pretty tanky due to Endurance Charges and Stun. This build can easily be done in hardcore.
(Not updated for 1.2.0) Phase Acrobatics, Ondar's Guile, Acrobatics.
High Evasion/Dodge/Block percentage. Claw/Shield, Life leech. Really fast-paced game-play. As long as there are enemies to hit, you can't die.
Chaos Inoculation, Ghost Reaver, Conduit, Unwavering Stance.
High Elemental DPS Spellcaster, It uses the Voll's Protector and the Voll's Devotion Amulet, and high critical chance gear. Build is updated and 1.2.0 ready!
Resolute Technique, Iron Reflexes, Blood Magic, Unwavering Stance.
The Infernal marauder is a pretty straight forward and a solid build, you can barely do something wrong with it and it is very easy to use. This build provides a very good balance between dps, survivability and affordability.