Have 3 DPS that can do around 17k overall (not a bad ask IMHO considering I did more than that as my offspec), have a healer that can do the whole run with little to no mana breaks and have a tank that doesn't need CC to keep aggro/won't spent 5 minutes in between every pull and the run is quite easy.
I admit the stars would have to align to get those 5 in a random PuG (although the wheelchair buff you get from LFD helps) but it shouldn't be too bad for most people going as a guild.