2 Generals
4 Cav (usually Dragoons)
12 Line Infantry
2 Grenadiers

I'm still experimenting with the Grenadiers. I have yet to find anything they're exceptionally better than Line Infantry at. Chucking grenades at enemy units in buildings tends to break those units, eliminating the need to storm the building, but Grens also get chewed up pretty easily in ranged and melee when fighting vs Line Infantry.

I never bring any artillery because I've never found it to be more effective than line infantry at anything. Low accuracy, slow rate of fire and failure to kill even when it does hit makes it essentially useless. Maybe if there were 6 cannon in each unit instead of only 3 it might be a bit better. But with nearly every map being a featureless flat affair, the lack of chokepoints and natural barriers makes it pretty easy to outflank them, unless you babysit them with other units that could be out killing stuff themselves.

I may drop 1 General and the 2 Grenadier units and replace them with cannons just for the hell of it. I like to give arty a try every once in a while, just in case I might stumble up on a use for them.