I've gotta ask... once you've got the top UNM and NM chests, what on earth do you care about the hard and brutal ones? And how do you manage to spend that much time on those 4 attacks? 

No argument with the basic point that they need to do something about daily activities taking too long, even if the number of people with your particular CB problem is likely to be rather small... 

Even if you get 3-4 ancient shards / void shards per week from brutal / hard (you get much more on average) that's a lot of shards you skip on per year just for being lazy. I'm not a massive spender so every shard or book comes in handy and CB is the best source of those by far. 

I score 160M~ in brutal and about the same in hard, the problem is if I don't go the entire distance then we don't kill the clan boss as there's only few guys in my clan hitting those.