Stop coddling. 3k is absolutely not okay(tho tc did die, Rez peeps, and probably isn't very familiar with the fight so this isn't really directed at him, just saying in general.) Enrage for o1s is 19k rdps. If every dps did 3k that's only 12k. Tanks do the tank equivalent of 3k, 2k. Healers, 500. So that's 17k rdps. That won't clear. And it only gets worse enrage for o2 is 21k, 3 is 23.5, 4 is also 23.5ish but more downtime. That's the end of the 340 line. The ones above it are for being in 341-370 gear but 5 is 25k, idk 6 or 8, but 7 it shoots up to 29k so dps need to be at least 5k, tanks at 3.5k-4k and healers at 1.5k.

In a smooth deathless fight 4.5 is a reasonable number to shoot for @ your ilvl TC. You should be able to push almost 5k as you learn the fights and your class and push limit and then go further beyond that if you have a heavy support comp.