Working on a henchman NPC

[XagencyX]

And I was wondering if anyone would critique my build, maybe suggest some improvement, or offer criticism. It's a 9th level chain trip build, so any help would be much appreciated, as I've never done this particular build before. I'm trying to set it up so that the henchman will be able to fight defensively, have a massive AC, and a large threat range.

Human
Lvl 2 Swashbuckler, lvl 4 Fighter, lvl 2 Duelist, lvl 1 Monk.
Str 10
Dex 18
Con 10
Int 14
Wis 16
Cha 10

Feats:
Combat Expertise, Improved Trip, Exotic Weapon Proficiency: Spiked Chain, Combat Reflexes, Dodge, Mobility, Improved Combat Expertise, Daring Warrior.

Class Abilities:
Weapon Finesse, Grace, Canny Defense, Improved Reaction, Improved Grapple, Flurry, Unarmed Strike.

I haven't done any equipment yet, and he'll have Enlarge Person and Permanency cast on him by the BBEG. So any suggestions?

Also, the order of leveling is:

Swashbuckler, Swashbuckler, Fighter, Fighter, Fighter, Fighter, Duelist, Duelist, Monk.