Improving My Fighter (pathfinder)

[Nosta]

I'D Like some in put on the feats I am thinking of taking for my Fighter(Myrmidon)
This is For A pathfinder Game That will start At Lv(16)

I am taking two flaws At first level, gaining me two Extra feats
The Gm is Allowing Both pathinder and 3.5 Feats

My stats Are STR-18 Dex-16 Con-16 Int-13 Wis-16 Cha-10

My Feats Are as Follows
1st Level Feat: Extoic weapon Pro Fauchard
Racial Feat: Improved Initative
Fighter Bonus Feat: Power Attack
Bonus Feat From Flaw: Combat Expertise
Bonus Feat Mobility
3rd level: Improved Trip
4th level fighter Bonus feat: knock Down
5th level: Greater Trip
7th level: Cut From The Air
8th level fighter Bonus Feat: Half strike
9th level Smash From the air
11th level: Combat Reflexes
12th level fighter bonus feat Combat patrol
13th level Defensive Sweep
15th level Intense blows
16th level fighter feat: Knocking blows

As you can see my main trick will be Trip Attempts using knock Down and power Attack with knocking Blows

I am just wondering if i could make this a better build by switch out a few feats for something else that i am unaware off