Just a word of warning. A couple of the weapons for the invasions at the end of WOD weren't actually available from that source in game. I spent weeks trying to get them all and after getting most of them 5 plus times, I found out the last couple I was missing weren't even available in game. This was despite them being listed all over the front page of MMO champion and other well known websites.
If you are after a specific item it's worth checking it's even available before wasting hours trying to get it.