From current implement to:

Single Weapon Fighting: While Single Weapon Fighting, you gain +20% Combat Style bonus to attack speed and +2 Combat Style bonus to Melee Power. Requires fighting with a single one-handed weapon, and wielding only an orb, runearm, or nothing in your offhand.

Improved Single Weapon Fighting: Your Single Weapon Fighting bonus is increased to a +25% Combat Style bonus to attack speed and an additional +2 Combat Style bonus to Melee Power. You now apply 25% more of your appropriate ability score modifier to your damage instead of just your modifier (for instance, you add 1.25 times your Strength modifier as damage, similar to Two Handed Fighting.)

Greater Single Weapon Fighting: Your Single Weapon Fighting bonus is increased to a +30% Combat Style bonus to attack speed and an additional +2 Combat Style bonus to Melee Power, for a total of +6 Combat Style bonus to Melee Power. You now apply 50% more of your appropriate ability score to your damage.
Light weapons get strike through chance of 80%, but strike through hits uses half of your appropriate ability score to your damage.