Each must find their own way. If those in our heartland had witnessed the savageries of the voids as have we they would know this. The hand of each of the great starfares is turned against the other; none will join their strength together just to see their ancient enemies prosper. Neither should we.
I would probably use both insignia around the building as a whole, but probably use the Empire insignia as the symbol that is the center piece for the entire landing pad. Just my opinion.
Well, given that the Earth caste would build it (for the greater good) and the Air cast would use it (for the greater good) to transport goods, negotiators/traders and warriors (for the - you get the picture)., use the T'au symbol, as this is the best representation.
Yeah, or the sept marking of the constructors. "Be extremely subtle, even to the point of formlessness. Be extremely mysterious, even to the point of soundlessness. Thereby you can be the director of the opponents fate." Sun Tzu
Calling all Tau! Want to play in Online Campaigns? Then the Cadre could use your help!