No expansion without equilibrium. No conquest without control. Pursue success in serenity. And service to the tau'va. With pride. -- Shas'o T'au Shi'ur
A little trick I've learned is to use the Ghost Stalker in combo with the Mammoth MK.II for additional Rail Gun fire power, they can quickly cut down large formations of infantry, destroy armored vehicles much more effectively than on their own and draw fire from one another.
Just be careful they don't shoot each other :P