After the first play though with this faction I found level 3 on their research tree to be pretty frustrating to play against:
If you have 2 armies in a region you gain two of that resource when collecting
With 4/6 armies they can just sit on 3 regions with a healthy income and not be attacked.
Levels 2 & 4 also just feel a bit annoying to play against - they always have the freedom to do a beneficial action on their go.
I think the only way to counter is to be really aggressive to the Satyrs player before they can get dug in. Or pick Dark Elves, who I think at level 3 can attack 2 armies in a region.