Quick note: Even without parsers you can get an idea of who's doing what based on threat gauges. If I see a DRG pop in my expert, with similar (or better) gear than mine, and he's under 50% of my threat for an entire fight, something is seriously wrong.

I shouldn't be doing enough dps on my own to literally drop the second dps from an expert and clear the fight normally--specific example cited is the time we locked a DRG out of phantom ray because he d/c'd right as we engaged, and that fight went as well as the others did (since that guy contributed absolutely nothing to the second and third fights when he came back).