You're talking about pointless numbers, then list skills that increase DPS?
A DRG does not achieve maximum DPS without Disembowel. Disembowel is great for BRDs in the group, but you as a DRG won't even achieve max DPS yourself unless you Disembowel, because all DRG attacks are piercing attacks (not to mention that you won't be able to use Chaos Thrust either).
DK with MNK isn't just for the party, the also won't achieve their best DPS if they don't apply it because every attack that they have, minus DoT ticks (those count as unaspected damage, Idk if the same applies to DRG) is a Blunt attack.
Most of the skills you listed for BLM/SMN are off the cooldown, so it won't affect their DPS. If they're not using these skills, it's not because it affects their DPS, but because they don't know any better.
PLD cover is an underused skill (and it won't ever be used when the tank doesn't use basic mitigation skills like Foresight and Rampart) I'll give you that one. PLD Cure, on the other hand, does EXTREMELY little healing, which can work on "off-phases" where you don't need to move, but 2 healers would top you off anyway when they're healing (or prehealing) the AoE damage that just happened, so it's a moot point (like a Titan jump). PLD SS like you said, is very useful.
Healers can contribute a whole lot to DPS, like you said, but not many of them do so.
I did not talk about BRDS because I do not have a lv 50 one, so I am not comfortable talking about them.
Here is where it gets frustrating. A DRG not using Disembowel and a MNK not using DK aren't abstaining from using said skills to boost their DPS because it actually lowers it (and greatly for DRG due to no CT either). You said in an earlier post not to give advice unless asked. Would you abstain from giving someone helpful advice that will not only boost the time of this run, but more importantly make these players better in the long run? If you're rudely spoken back to, or totally ignored, then that is frustrating. I've met a lot of players that say "why are you telling me this? No one is dying and we beat the dungeon." That's very true, but it could have gone a lot smoother if they had not spammed their Full Thrust combo (which WILL likely result in death from lack of DPS when they move on to harder Full Party fights), not to mention that it's a carry. You will also be met with even more rude remarks if you suggest to a healer that they can cleric dance and help with DPS if they want if the tank can effectively use defensive cooldowns.