This competition had some phenominal entries, all of which can be seen right here: Mogolympics - Javelin Recap.
I chose to build my outfit around Halberd of Desolation, the polearm that drops off of the very first boss in Black Temple. This was my personal favorite of all the outfits that I submitted for the Mogolympics. Similar to the wresting event, I missed the podium again by literally just a hair (1 point...heh).
Items used in this Transmog & Source:
Tankatronic Goggles - Engineering
Pauldrons of the Wardancer - Hydross the Unstable, Serpentshrine Cavern
Savior's Grasp - Archimonde, Hyjal Summit
Glorious Gauntlets - level 50 -55ish world drop
Emerald Girdle - mid-level 50's rare spawn/world drop
Greaves of Pacification - Justice Points, Vendors in Shattrath & Isle of Quel'Danas
Emerald Sabatons - mid-level 50's rare spawn/world drop
Halberd of Desolation - High Warlord Naj'entus, Black Temple
See this transmog on other race models: WoWhead item comparison of this set