looking for a good build strategy

[Miller Flagstone]

I just made a sylph (pathfinder advanced race guide pages 156-161) my base stats are after level and race adjustments.

str 15
dex 18
con 13
int 12
wis 13
cha 10

I was thinking of using weapon finesse, looking for help with my build. We'll be starting at fifth level
and was looking for a good fighter class that would fit well with my stats and race.
I was thinking of using a duelist, but i was thinking maybe there are better options available.
I also have 10500 gold pieces to spend on my character.

[Nicos]

You could go free hand fighter with the dervish dance feats. maybe the crane style too. Then you could go duelist.

Free hand fighter

1. weapon finesse, weapon focus (scimitar)
2. dervish dance
3. Dodge
4. Improved unarmed strike
5. crane style
6. Mobility

Duelist

7. Crane wings
8.
9. Improved critical.

[Psion-Psycho]

I built this character a while ago as a human but im sure u can re work it a bit to fit ur character if interested.

Human
Fighter (Weapon Master Scimitar)

-Stats-
STR 14 (+4 Leveling)(+6 Magic item) = 24
DEX 17 (+2 Racial)(+1 Leveling) = 20
CON 11
INT 14
WIS 10
CHA 07

-Feats-
01 Two-Weapon Fighting, Improved Shield Bash, Weapon Focus Scimitar
02 Combat Expertise
03 Power Attack
04 Weapon Specialization Scimitar
05 Improved Sunder
06 Greater Sunder
07 Improved Two-Weapon Fighting
08 Improved Critical
09 Critical Focus
10 Shield Slam
11 Shield Master
12 Bashing Finish
13 Greater Two-Weapon Fighting
14 Sundering Strike
15 Tiring Critical
16 Exhausting Critical
17 Sickening Critical
18 Critical Mastery
19 Greater Weapon Focus Scimitar
20 Greater Weapon Specialization Scimitar

-Method-
Use a Heavy Spiked Shield enchanted with +4 for defense and enchanted with Bashing, Holy, and Speed for offense so when u are shield bashing ur shield counts as a +5 holy weapon that does 1d10+str that also does not take the two-weapon fighting penalty and keeping shield bonus to AC. When ever u score a crit with ur Scimitar, on a 15-20 dice roll, u get a free shield bash and sunder while also giving the target the Exhausted and Sickened condition. Scimitar should also be enchanted with Speed to give u 5 attempts to get a free shield bash on those crits. If ur lucky u can get 14 attacks in a single round.