Skirmish is designed for parties consisting of 4 to 8 Disciples of War or Magic of level 45 or higher.
Taken from Lodestone announcement of Skirmish.

http://lodestone.finalfantasyxiv.com/pl/topics/detail?id=918cc39893606915fdcff1cc8f9502aef69a10b2

I thought that "hey! Finally some low party size content!" I was so excited. To find out that its actually 8 man content. There is no way that you can win with 4. Unless you were geared to the teeth and coordinated using third party voice software.

Square-Enix, I am not complaining that I couldn't beat this with 4 people. I just want to say that people that I have talked to and including myself read "4 to 8" people to mean groups of 4, 5, 6, 7, or 8 can defeat this content. I am thinking it needs to be reworded to not be so misleading. Just wanted to share this.

Thanks for the awesome instant content we can do. When I get groups of 8 it will be a blast!