Comparison of two-weapon fighting feats

The feats Two-Weapon Fighting Improved Two-Weapon Fighting Greater Two-Weapon Fighting and Perfect Two-Weapon Fighting provide different benefits to dual-wielding characters. They are outlined below.

Special: If the off hand weapon is considered 'light', attack penalty with main hand and off hand are reduced by 2. IE -2 main hand and -2 off hand for Two-Weapon Fighting feat.

Monkey Grip allows the use of two handed weapons in one hand at a -2 penalty to AB

[[Haste] effect adds an extra attack to both hands

List

No Feat Primary Hand: -6 to AB Off Hand: 1 attack at -10 to AB

Two-Weapon fighting Primary Hand: -4 to AB Off Hand: 1 Attack at -4 to AB

Improved Two-Weapon Fighting Primary Hand: -4 to AB Off Hand: -4 to AB + 2nd attack at -5 to AB

Greater Two-Weapon Fighting Primary Hand: -4 to AB Off Hand: -4 to AB + 2nd attack at -5 AB + 3rd attack at -10 AB

Perfect Two-Weapon Fighting Primary Hand: -4 to AB Off Hand: Same number of attacks as main hand