Yet another one question on D&D finesse fighter build.?

I'm in a progress of building a new character (3.5e Eberron, as usual..), starting level 6th. What I currently have is close to this: 3lvl swashbuckler/ 3lvl ranger. stats at 6th level are str10/ con14/ dex20/ int16/ wis9/ cha10. Due to a loss of an eye and a replacement of one with "something quite special", he's got 2 flaws: Shaky and Murky Eyed. That leaves us with 5 feats in the course of 6 levels. The idea is to make a dual weapon wielder, with Spiked Chain in each hand, specialising in trips. Feats already given as cl ones are: rangers Ambidexterity, Two Weapon Fighting, Trach, Toughness, swashbuckler's Weapon Finesse, Insightful Strike (bonus int modifier to damage rolls, yummy...). I'm planning to take Combat Expertise, Improved Trip, Oversized Two Weapon Fighting, Monkey Grip and probably Weapon Focus(Spiked Chain) as the 5 allowed feats. And, I also arranged an Agile Athlete as a christmas gift (to the character, not to me). Starting with ranger we get (6+3)*4= 36 skillpoints, maxing skills like Tumble, Jump, Escape Artist, Use Rope, Balance, Survival and some Knowledge (probably local and nobility, for some special reasons). Need advice on optimisation, skill pimps (remember, we're on 6h level with 75 skillpoints.. a wide field for speculation), feats/flaws, and, most important, GEAR. Anything not higher than 20k (16k preferably) is OK. My sketch of the equipment is: +2 mithral chainshirt(5k), two +2 Spiked Chains (8k), amulet of Natural Armor +1 (1k), Ring of Deslection +1 (1k), two masterwork boot daggers hidden in the soles of the boots, spring driven (complete scoundrel). Healing potions/clothes/stuff. To make it ideal (up to 20k), adding a Belt of Dexterity +2 (4k). That gives us 72 hitpoints and 22 AC (23 with the belt, 26 with Combat Expertise on). Feel free to mail me on the subject.. I need help on this one. Our DM makes life really tough for flippy characters.