@plasmaduck: The dwarven gyros are pretty terrible at this time as the ai on them is mostly broken, and even if you constantly micro them to fire more often, their damage output is pretty underwhelming. If you haven't used the ironbreakers yet, I highly recommend them asap as they're so good and fun to watch. They can also throw their explosive charges over units in front of them, so you can have thunderers up front and ironbreakers right behind them to have a literal line of awesome explosions vaporize charging enemy units.
Glad you're having fun with the battle system. If you haven't tried out the Empire campaign, I highly recommend it as it feels completely different. Not only do you have new units, but diplomacy is much more important with so many quarreling human factions, and lots of unexpected things happen. Plus having some actual cavalry feels really nice after playing through a long campaign of dwarves, who although awesomely in their own way don't exactly have any exciting units to micro.