PvP build. Recently experiencing 80% success rate. Two-handed claymore / broadsword build.
+10 Claymore / other medium sized sword.
+10 Grim's helmet
+10 Drakekeeper's Armour
+10 Allone Knight leggings
10 Drakekeeper's Gauntlets
Rose Shield (for stamina regeneration)
This build is really good against other soldiers, rogues, and mages. It's sort of an all around build, and a little week against magic, but depending on the opponent you can equip various rings to reduce damage from spells. I've had really high rates of pvp success with the build. The key was just combining high HP and defense stats with high adaptability, the result was a highly mobile, aggressive soldier that could get close, dodge attacks, and still take a pounding while dealing damage with the claymore or other weapon of choice.