I see it every run of roulette. SOmetimes DPS, with same classess is high, and mobs die fast, other time, it gets slower. To tell the truth, I really don't care. When I get enough healing, and mobs die, I don't bother who does what and how. Yes, it might take longer, as I might need to take 2-3 pulls in BF instead of one... but hell with it. It will be just few minutes difference. I rather play with people who have fun by playing the way they want, instead of doing it with stressed guys who gets yelled on like: "DO THIS THAT WAY, L2P NOOB".