Being a fast, mobile strike force, my Tau army has very little heavy support. So far there are only two units, a broadside and a hammerhead gunship.
The Hammerhead tank is called the Starfall. I chose to use an ion cannon as I felt that 3 str 7 shots was more useful than 1 at 10, for most opponents. I also liked the idea of a large str 8 ap 3 blast when fighting marines. Rather than drones it has a twin linked smart missile system, for when the enemy is behind cover.
Shas’Ui Monat Or’es is currently the only broadside pilot and he likes it that way. His broadside is equipped with high yield missile launchers. The secondary weapon choice varies, but he often has a drone controller and a missile drone, for a bit of extra firepower.