The wording on this is a little misleading it should read Complete a Raid witha fireteam consisting of only clan members. This can be done with a clan fireteam of 2 - 6 members. Well at least thats how it works on XB1. I got it with a fireteam of 2 clan members.
I was wondering if that was the case, I got the Strength Of The Pack trophy (same thing but in a strike) with just one other person. But thanks for confirming that (on XB anyway )
Edited by Metdevil, 24 October 2014 - 01:12 PM.