I have been workin gon my Vior'la Sept currently deployed on Yaisdra IX for our campaign http://worldcampaigns.blogspot.com/
My friends and I have started our own campaign to help us progress our army projects as well as just plain old fun
My forces are from the Vior'la Sept being led by Darkstrider. Here is fluff I've written so far on it.
"Now with Shadowsun leading T'au forces elsewhere she has Sent Vior'la High Command Sub-Commander El'Myamoto to command and advise Vior'la limited forces in the Yaisdra IX Expeditionary Force. Darkstrider knew the limited forces that had been committed to the Expeditonary Force would present a challenge. When he made planetfall under the cover of darkness, Darkstriders Taskforce consisted of a poorly equipped group of Advanced Insertion and Optimised Stealth Cadre along with Air Protection Squadrons consisting of Barracuda Air Superiorty Fighters, Tigershark Heavy Fighters, Razorshark Strike Fighters, Sunshark Bombers and an extremely limited number of the new Barracuda Ax-5-2 Multi Role Strike Fighter.
Darkstriders plan was simple, he would facilitate harrasing ground attacks on Imperial Forces while being supported by his Assigned Air Caste elements. Gue'vesa would also play a critical role in the insurrection of Yaisdra IX. The Gue'vesa (which literally means "Human Helper" in the Tau Lexicon) is the name the Tau have given to those humans who have willingly joined the Tau Empire. Many Gue'vesa now fight alongside the Tau Fire Caste on behalf of the Greater Good. They even take up arms when required against their fellow humans of the Imperium of Man. Needless to say, Gue'vesa are considered the worst kind of traitors to the Emperor of Mankind and are believed by the Ecclesiarchy to have been spiritually corrupted for willingly associating themselves with a xenos culture. The term Gue'vesa'la is given to the standard human troops of the line; their non-commissioned officers, equivalent to sergeants in the Imperial Guard, are known as Gue'vesa'ui. Darkstrider had one more trick up his sleeve; Jeakim Slovaz."
The first Cadres to land on Yaisdra have shunned their traditional white armor for a more concealing Ochre style. This allows them to me efficient in their low combat numbers until I build more cadre ( or their reinforcements arrive)
Image Gallery http://worldcampaigns.blogspot.com/p/project-gallery.html