Can someone give me an in-depth explanation why Summoner is arguably the worst DPS?

[Delta041]

FCOB definitely requires more MP awareness for SMN compared to previous Coils though.

The problem is that Summoner are solely responsible for their MP. It's similar to the white mage issue but they get 1500-2000 more MP than summoners, so they naturally get more MP per tic. Melee have to manange their TP but they expect to receive army's paeon or goad. No static with a bard is gonna drop their DPS for Summoner, and in statics without bards, Summoners are pretty much on their own.

[Akiza]

White Mage can recover their MP by casting regen on themselves and shroud of saints medica 2.

[Judge_Xero]

The problem is that Summoner are solely responsible for their MP. It's similar to the white mage issue but they get 1500-2000 more MP than summoners, so they naturally get more MP per tic. Melee have to manange their TP but they expect to receive army's paeon or goad. No static with a bard is gonna drop their DPS for Summoner, and in statics without bards, Summoners are pretty much on their own.

Being responsible for your MP isn't a major issue since it's easy to pace yourself for a 10 minute fight with minimal DPS loss. The issue is that that DPS is already low.

Let's say that as SMN you have unlimited MP, how would you increase your DPS over other classes?

Ruin II spam so you can get in more auto attacks -> Most AA's actually get through without Ruin II spam so this would raise your DPS by ~7 with 100% up time on the boss.
Miasma II every Contagion -> (+ 40 Potency over Ruin @ 60s = 2.3DPS)
Use every Aetherflow for Fester instead of Energy Drain = Compared to using Energy Drain 1/3 of the time 9 DPS.

So now you've been able to increase your DPS by 19. Just need another 50-100

Can't really even blame it on gear. I know SMN gets shafted by Spell Speed this gear set, but overall it's a loss of like 20 DET the way that the secondary stats scale. (losing 45 DET but gaining around 60 Spell Speed) Round it up to 6 INT worth of stats and that's like a 3 DPS gain.

Edited: Just wanted to mention that the above is comparing classes close to i130, the difference isn't near that great for i115 or less.
equal classes at i115 SMN is ~20-40 DPS difference. (not counting bard)

[YanderePrincess]

White Mage can recover their MP by casting regen on themselves and shroud of saints medica 2.

Um....what? Only Shroud of Saints restores mana. Regen and Medica II give health regen. They do nothing for getting mana back.

[Akiza]

Other DPS Jobs gain damage over the course of the entire fight for example the Black Mage damage increases with each hit during their umbra fire rotation then during umbra ice it stays at a certain level. Summoner's ration is steady DPS then spike and rapidly drop off while trying to squeeze every ounce of DPS out of the job.

[Lyrica_Ashtine]

White Mage can recover their MP by casting regen on themselves and shroud of saints medica 2.

This post just gave me fifty kinds of terminal diseases

[Razard]

This post just gave me fifty kinds of terminal diseases

Don't worry, Akiza has that effect on people.

[scarebearz]

Other DPS Jobs gain damage over the course of the entire fight for example the Black Mage damage increases with each hit during their umbra fire rotation then during umbra ice it stays at a certain level.

This is not how BLM works.

[ereskigal]

We haven't gotten an answer by now we probably not going to get one, at least not till 3.0, I have a hunch that classes will be gone and smn and sch get a rework more so smn. Just think about it if they split the two jobs smn can get to keep Carby (what a lot of smn been asking for), and still get the 3 new egi. I hope smn become more pet focused. Anway I hope smn get some sort of rework come 3.0. Because this same issue will only pop back up again so long as smn and sch is tied together.

[Akiza]

This is not how BLM works.

During the umbra fire the Black Mage is gaining stacks and getting procs which increases their damage and while in umbra ice their damage is steady while they restore mp.