On the tau side I had a commander shas'o with missile and fusion blaster, a fireknife crisis suit, 8 pathfinders (with devilfish) two 9 man teams of fire warriors a pirahna and two 3 man teams of stealth suits one with marker drone.
After Tyranids turn one everything had moved and ran. The terma gaunts ran particularly well moving to hold an objective on their left flank right away.
Tau turn two and i dumped the firewarriors out the back of the fish to rapid fire the warriors sneaking round the side of the ruin and did very little damage I marker lighted the genestealers again and did alot of shooting at them
Tyranid turn 3 and the warriors killed aload of fire warriors with death spitter shooting then slaughtered the rest in close combat. The sergant and two tried to run but were poked through the head and abdomens by scything talons ... probably.
Tau turn 3 and the surviving fire warrior team jumped in the devilfish and moved to hold the objective in the middle again for the greater good.
With nothing to marker light the pathfinders readied themselves for some real action and moved towards the terma gaunts firing their carbines at them killing one gaunt.
The warriors moved to contest the objective (wood elf is objective lol)
Tau turn 4 and the pathfinders moved up shooting and killing another gaunt causing them to be pinned then they assualted the gaunts (I needed to contest the objective at all costs) They lost two guys and killed two gaunts in return drawing combat.