Most useful dps

[P_Wing]

Apart from the plumes, BLM excels in Ifrit, I guess. Ranged party makes things easier for Ifrit so I won't discuss about meelees here .

Although SMN did more damage overall, but the only crucial parts are the nail phases and BLM did well there I guess.
SMN can leave dots at nails, but careless attacks can make the stacks go high due to later nails are destroyed too fast, so I guess BLM and BRD are easier and safer to play there.

Just my viewpoint as BLM, though. You can say I'm biased

[Sessurea]

Caster in ifrit hm <3 Dat lb *_*

I love being in party with blm/smn generally, due to foe requiem/battle voice.

[Ruri]

I love seeing a smn who actually knows how to play

[Mephistopheles]

A BLM has strong first rotation burst if they end the initial rotation with a swiftcast>flare>convert>fire then into blizz 3, if lucky you might even get a fire 3 proc on the fire, also helps to use raging strikes during this. After that our single target DPS becomes based on procs fore firestarter and thundercloud. I personally enjoy being with a BRD, MNK, and DRG. DRG has that Disembowel for themselves and BRD, BRD has Foes Requiem, MNK is the heavy single target DPS and BLM is the comfortable DPS.

[T1M0N]

I think Bard is the most useful dps ofc.
But for a team comp i think
DRG:huge burst damage and strong single target and good aoe damage,can also share the debuff with bard
BLM:huge burst damage,unlimited mana,highest aoe damages
SMN:can raiz,strongest single target dps(IMO),good burst
Bard:Can dps wihout any interruption resulting in a really good dps(even if it's the lowest) and can support greatly with songs.

Team comp like this resulting on a huge single target dps(SMN +melee)high versatility(SMN can raiz,3 range so if a fight is not good for the melee they can help him on that)very high aoe damage(bard song+his aoe+DRG aoe +BLM aoe are just destroying adds really quick) and huge burst damage.

[Kirinichibon]

SMN and MNK seem to kill things the fastest with good players...though it's tough to find good players sometimes. Bard helps bad or poorly equipped healers. BLM seems to bring the least utility to me, just lots of aoe...though they do great burst damage if they can stand still long enough.

[Taerra]

As a healer/tanker, classes i want to see in dungeons:
#1 - summoner, the only class that can revive a dead healer (otherwise wipe) -- not needed if people knows what they are doing
#2 - bard: excellent aoe, excellent dd, recovery songs. - agreed
Classes i do not want to see:
#1 - BLM: squishy and afraid to use spells because they might steal aggro; -- Noobs ignore quelling strikes, solves a lot of issues
#2 - MNK/DRG: i cannot move because it screws their positioning, and they get hit by almost all melee aoes, and over all that they make bosses immune to stun; -- noobs who dont know fights will get screwed. Otherwise I don't see an issue.
#3 - newbie healer dps - they just cause unreasonable wipes. - agreed

[Ooshima]

Looks like a lot mentions on summoners, meanwhile I've been hearing no one really plays SMN and SMNs I knew were laughing at the fact that in Wineport, no one ever shouts "LFM SMN for coil" lol.

But really, for a progression team, I really think BRD and SMN is a must in party composition. Both gives consistent damage as they aren't affected by mobility fights. SMN is there to swift res a dead healer and if the dead healer is a WHM, you will need a BRD to Battle Voice-Ballad the raised WHM. Even if the content is on farm, like T5 for my team, it's still pretty important as shit can happen during hatch phase and there were times where our WHM died, SMN did a swift rest and I'll just move over to the WHM and do a Battle Voice-Ballad. Without it, the team would probably wipe (yes there's a SCH in this forum that does a solo T5 heal, but we've never done so).

[Kirinichibon]

How often do you need to move while tanking that positional attacks get annoying? My PLD is only mid40s, but it hasn't bothered me at all. MNK/DRG come with a great LB, too.