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

[Xisin]

the 555 on t10 is achieved by: using RS on pull coupling it with int pot cast as normal ( I got 0 blue orbs.) Aetherial manipulate in order to pair up for the blue orb helper (sorry I can't word this any better.) when RS comes up again hold it don't use it until then lb add phase. That particular add phase I used lb 2 since lb 3 isnt up yet cause gear and shit. after lb drops cast thunder on one courel opposite of your intended target, use fire 3 on said courel, swap hit raging strikes, use fire 1s until you get to flare mp, cast flare, swiftcast convert, flare again, swap to a new pair with quelling up, ether flare, RS falls off. resume dps by ending every fire with a flare as long as there are more than 1 target. when transposing out of flare make sure you get atleast two ticks, or your transpose won't be off cool down if you only wait one, this is a rng thing cause sometimes you wont need to wait. If you have to wait use thunder 1 or somethign as filler, hold thunder clouds in this phase for when you are in ice phase. Resume dps as you normally would after. There is some luck involved due to blue orbs and you need selene. My static doesnt go until saturday, but I'll record until I catch a nice parse again.

Nothing wrong with those numbers, a lot of it depends on your group and how the team deals with different mechanics etc.

People boast about doing X DPS on X fight, but for a real comparison of DPS you'd need to be in the same party and do several runs together.

Exactly what this dude said. I'm not as much boasting as I am comparing my highest to Lucrezias' nin's highest. which is 555 to 607