I have two separate loadouts for swordsman, a regular one and an FSC one.
Regular:
Chaos cap
Chaos cloak
Barbarous thorn shield or Grey Owlite Shield (I'm not sure if putting Chaos together with the Barbarous will make an inefficeient boost. Will it go over, or just maximize?)
Final Flourish
Combuster
Acheron
I'm very skeptical about the armour, not so much the swords though.
FSC:
Vog Cub set
Great owlet shield
Combuster
Acheron
Blitz Needle
This one i am INCREDIBLY skeptical about on everything. I mean, do i need a shadow sword? Should i take a different elemental sword since every there resist fire? Should i change my armour since Vog is inefficient if you use Bltiz Needle?
And then Bomber.
Just one load out
Volcanic demo set
The void bomb (don't remember it atm)
Venom Veiler
Nitronome
They're just fine. Chaos is among the most OP gear in the game and Vog is a very good set for those without a lot of experience in FSC as well as those who don't have a lot of ASI UVs or trinkets or sprite perks. You can mix Chaos and Vog Cub when you need some fire resistance but don't wanna lose all your damage bonus.
Chaos gives Very High damage bonus when you wear both pieces. Barbarous Thorn Shield bumps that up to Max for swords; there is no waste. See also: http://wiki.spiralknights.com/Abilities#Other_Offensive_Abilities
There's no reason to bring a Shadow sword to FSC. Although it is good to have, I'd recommend getting an elemental damage gun such as Nova Driver, Argent Peacemaker, or Arcana.
You should use Combuster, because enemies will not stop in the middle of your charge when Freeze or Shock hits - instead you hit them with all explosions from the charge giving you more damage and knockback.
Don't bother with the Volcanic Demo set if you aren't interested in full time bombing. Using Chaos will prove much better, especially if you wanna use both a vortex and Nitro.