casuals who do 6k dps overall should have there account permanently banned if they are found to be doing so in a +20 key, its disrespectful to the other players in the group.
Or there should be a system in place that scores a player based on number of interupts, failure damage, output etc. it wouldnt be hard to calculate.
i feel this would help the game come back to life as the good players are rewarded with a score that reflects there ability rather than just having score because there class is invited to everything as its difficult to play badly (being meta)