Ranged DPS role is about to be excluded from all content

[Karja]

i would say balance around the 90-95% range.

But what would that mean in RPDS?
If I apply BLMs RDPS at 95 percentile as RDPs for DNC and then use the same % decrease DNC currently has it would deal more RDPs than BLM at 50 percentile by nearly 500 dps.
Another point is how good must a player be to currently achive 50% in a fight like E4S? And must a player be as good to do it on another Job e.g. is 50% for a DNC equally demanding thant 50% on BLM?
Should this even matter?

When it comes to the skill ceiling, if the balance of a job is skewed due to a higher intentional complexity in order to justify higher dps, then there should be an endgame imbalance. However, this would mean that the job is also not liable to receive QoL updates to decrease difficulty, something Level 80 Black Mages may note is exactly what Xenoglossy is. This difficulty must also be something that can be objectively perceived, not just something on a subjective level, since players may excel at different things, and to punish a player for being who they are (as a person) is something that shouldn't happen.

The difficulty of BLM isn't alone that you are less mobile compared to a physical ranged (even with xenoglossy the mobility is nowhere near the same for BLM and ranged physical, DNC even has En Avant) but also the fact that skill weaving is significantly harder on BLM than on physical ranged since you have very few options for weaving.
And the lastly that your big DPS cooldown in Leyline forces you to stand in a small place for 30 seconds, I'm currently not aware of another DPS buff that has such a requirement.
There are certain DPS spells like salted earth though.