This is Wraithcannon, posting as my PFS character in case you want to look at my stats.
Thanks for some great advice all.
Was planning on going straight Cavalier but that cav 6 fighter 6 build is nasty, maybe I'll try that next time. I'd have to pass on the shatter defenses and leadership though (No guarantee there will be a rogue in the random group I'm assigned to play with and Leadership is not allowed in PFS play).
The Gendarme archtype is nice too, wish I had UC when I had started this character. My only problem is that there are only 4 good feats listed out of the bonus feat selection, so you have to spread them out over the course of 11 levels or get stuck blowing them on less than stellar choices.
For example Bart, you took 3 of the 4 right away. Mounted Combat, Ride By Attack, and Spirited Charge. While this makes you very powerful in the short term, the only one left on the list that's worth a damn is Power Attack.
That leaves Improved Bull Rush (small guy on a medium mount, not happening, not even if it were Trample), Spring Attack (already have ride by attack, where is this useful), and Unseat (only good vs another mounted foe, situational at best, plus not that many mounted bad guys in PSF).
So if I were going to take Gendarme, and incorporate Mike's advice about protecting my mount, with the PFS 12 level cap I think my build would look like this as a straight cav.
1st mounted combat, shield focus
2nd (Dazzling Display)
3rd mounted shield
5th ride by attack, indomitable mount
7th wheeling charge
8th power attack
9th mounted blade
11th spirited charge
Kind of sucks taking spirited charge so late in the build but I really saw no other choice if I didn't want to blow a feat on something that wasn't useful, and crunching the numbers makes me think PA is better than SC damagewise.