I haven't played with my tau in 5th edition in about like.. 5 months so here goes..

I used to do very well and love them in 4th, but now with how important troops are.. I'm going troop heavy.

shas o
CIB, PR, MT, SG 135

3 fireknife suits, leader has BK 196

12 fire warriors, shas ui, bk, 135
DF, disruption, decoy, 90

3 more fire warrior squads

rail gun
burst cannons
multi tracker
decoy and disruption, 170 each.