Personally, I like the concept of using Arma. Not specifically the tactics side as they don't particularly transfer into airsoft that well, but more for the fact it helps to get to know each other as well as learn to help coordinate with your team better and learn correct comm discipline. On the day, there is not much time to prepare and plan drills etc. ANd it has got me caught out with my pants down a few times before. The two people who came down to Okto and had played arma together before were much better at communicating and coordinating with each other than the others who had just met each other for the first time.