i dont usually care about suits tbh. If they are closer, than the FW, then i go at them, but first, i usually decimate his scoring options. If that is a two flank maneuver, then i start mowing down one flank, and will eventually get to the other, if i dont kill it with my flyers and liquifires first. The only thing i do shoot at is mostly broadsides, and if they are dead, then huzzah! i can shoot at other things.
Flank denial for me also means i can start my tactics of eating away one flank and getting to the other.
Best AS in tau? 2up broadsides. What do we have? Disintegrators. What AP value? Yep, you guessed it, 2. 3 raiders, 2 RWJF, thats 21 dissi shots a turn. Did i mention that i also have liquifires in the raiders? with an average roll, you will have an ap of 3-4, and most tau unites have AS of 4. Pen? You bet!
In conclusion, the only greatest loss i had to tau is a RWJF, a raider and its haem. In trade, i table him usually by turn 3-4.