I would recommend dropping some WM for shield skill. Get at least 5. Try the (regular, not round) steel buckler. Both bucklers really need high shield skill to shine. They will take a lot more hits before breaking and start to "catch" projectiles that would before have just hit you.
High athletics and shield, defensive play, and practice with your weapon are most important if you are playing a swashbuckler/rapier duelist type build. Give this a try and see how you like it:
15 STR
24 AGI
5 Power Strike
8 Athletics
8 Shield
2 Weapon Master or Iron Flesh
If you choose WM you will have 125 wpf. With IF, it drops to 114. Of the 2, I'd take 125 speed any day. You will die quickly if you get hit no matter what.
I am almost level 32, and my build is 18/24 1H and shield. If you want to practice and get tips on how to move and swing in battle, I wouldn't mind fighting you on the duel server.
One last tip: What armor do you wear? Anything heavier than about 20 total equipment weight is going to slow your footwork down enough that high agility and athletics is a wasted investment. Definitely carry only one shield.
edit: oh it says your equipment right there. try the long espada eslavona if you like the side sword. Or the scottish sword.