I've only had problems with the timer twice. First time was in Qarn when I was playing my White Mage. The Tank was fine at first, but then he kept getting huge lag spikes. Stuck it out because he was a nice guy, but we just called it when we got to the last hallway before the final boss and there was 5 minutes left. Wasn't really there for anything in particular, was just there for fun so it wasn't a big deal. The second time was in Wanderer's Palace. Kept wiping on the slime boss over and over. Still have a slight phobia of this boss, but I haven't had that kind of problem with it since then.