Alright, I'm gonna update from what I've seen. To the very least, it does make sense to say that 2 minutes burst windows causes issues if fight design doesn't work. A direct example is P8S on the second boss. You get a 15 second window before Ego Death. This completely misaligns Summoner burst during the last phase which has a 100% damage buff.

As for other claims. I do apology but Reaper does trail behind. Reaper is one job that got nothing from the crit/DH buff.

As for BLM, like SAM and MCH they are pure firepower. They should be closer to each other while RDM, for example, should be about 3% behind.

There is one truth regarding rDPS. It scales much better over time than selfish DPS. So we should see a bigger difference early on. That being said, there's a 8% to 10% difference at the patch 6.2. This is too big.

In situations like SMN/RDM. I would say they should do similar DPS but RDM should have a slight edge because of skill ceiling. Summoner requires no brain. The issues Summoner deal are purely fight designs.