DE + Assassin detachment

I just got the Officio Assassinorum supplement and I'm curious to find out if anyone on here has paired up assassins with their dark eldar forces.

I'm interested in trying it out. Specifically, I'm really liking the idea of a vindicare assassin as a long range support unit setting him in cover and picking off high priority targets where needed.

All of them bring a lot to the table, and from what I can tell are all fairly well designed utility units that can accomplish a lot on their own.

Any advice or experience from anyone that has used them (allied with dark eldar or not) would be helpful.

Currently, I have all four assassins. After the first test play, my opponent told me that he's not gonna have a game with me unless I use all or none.

IMHO, culexus and calidus are brutal, vindicare is good, and eversor is meh. Though, this may be due to the fact that my opponent played GK composed of lots of psykers (good for culexus) and 2+ armors (bad for eversor).

I'd like to use them against other armies. But again, people may dislike seeing you choose one or two counter pick against their army so I'd rather bring all four as the formation of Execution Force for fun game - though the formation bonus looks not that good

P.S. It may be helpful for you to check our previous discussions: http://www.thedarkcity.net/t9848-inviting-a-mon-keigh-assassin