You are a master at fighting two-handed.
Dexterity 19, Improved Two-Weapon Fighting, Two-Weapon Fighting, base attack bonus +11
You get a third attack with your off-hand weapon, albeit at a -10 penalty.
A fighter may select Greater Two-Weapon Fighting as one of their bonus feats.
An 11th-level ranger who has the two-weapon combat style is treated as having Greater Two-Weapon Fighting, even if they do not meet the prerequisites for it, but only when they are wearing light or no armor.