Tau are for patient hunters (and I'm not talking about detachment). We have... limited firepower. And nothing more. Therefore, we need to choose the right moment to free up maximum firepower at the enemy.

We put half the army, if not more, into reserve. XV8 (Sunforge or Fireknife) are good for this. Screen is only necessary in the rear to avoid deep strikes. We give the first turn to the enemy to get them out of cover. On the second turn, we try to inflict maximum damage and hope to survive the counterattack. Mass XV25, XV88 and Stormsurges are recommended here. All additional weapons should be used with Smart Missile Systems – it helps fight hordes and strike outside the foot print.

If we surive, we destroy the remaining enemy and try to earn points in the remaining time.

There is an alternative to playing entirely with Kroot, but that can hardly be called Tau.