The results of this event can be seen here: En Garde! A Compendium of Fencing and...RESULTS!
I chose to design my mog around the 1h sword Blazeguard, which I believe is an absolutely gorgeous model.
Items used in this Transmog & Source:
Pauldrons of Roaring Flame - Cache of the Fire Lord, Firelands
Conqueror's Breastplate - Outland dungeon/raid trash drop
Flameguard Gauntlets - Garr, Magmadar, Golemagg the Incinerator & Baron Geddon, Molten Core
Belt of the Fallen Emperor - Emperor Vek'nilash, Temple of Ahn'Qiraj
Legplates of Blazing Light - Battleguard Sartura, Temple of Ahn'Qiraj
Lavawalker Greaves - Maleki the Pallid, Stratholme
Blazeguard - Blacksmithing
Dawnforged Defender - Eldara Dawnrunner, vendor on Isle of Quel'Danas (Exalted with Shattered Sun Offensive)
See this transmog on other race models: WoWhead item comparison of this set