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

[Judge_Xero]

Did Ifrit damage get ninja buffed?

Doing 160 DPS on a Dummy and I swear I was only around 140 last time I checked.

[Lyrica_Ashtine]

Lol ill properly reply to when I have more time to waste. But just a quick post.
Disease and miasma, derp disease is an additional effect of miasma.......
I compared to second wind as they are both self preservation skills, and you only need manaward if you mess up,

Less recast time is superior, it means it had more up time on the tank Lol.
Ill continue to school you later

And I won't bother with vivi you are just a waste of time, considering the nonsense you post.

The target builds resistance on the disease effect. While Miasma can still be applied on the target, Disease will be resisted after multiple applications.

Second wind may be a self preservation skill, but so is manaward. If you need manaward because you messed up and need to prevent another death from AoE mechanics, at least manaward can do this. Second wind won't prevent this.