Skirmish is the smallest sized game, up to 999 points. This is all we've played so far. Starter sets come in at about 550 points.
In skirmish you only HAVE to have 2 things, 1 armoured unit, and 1 infantry unit.
The starter sets are the best way to start! You get some anti tank stuff, some AA stuff and some infantry, and dropships to deliver it all.
Technically you don't need dropships but stuff moves so slow without them it would be difficult to get anywhere.
Played Wes the other night and its interesting how playing his PHR and Mikes Scourge made for 2 different games.