summoner dps how to do it

[Judge_Xero]

The current build you use as well as execution of skills will be key for it. I also heavily consider it a rotation thing. I tried the start with Bio thing + Ifrit and I always parse lower with it. If it is infact a better opener as you say, then I'd like to hear your exact opener skill for skill all the way till your third Fester, that is resulting in this DPS increase that's noticeable. If through testing it is in fact a better opener then what I'm currently doing then I can go slightly higher on these 3min tests.

Doing the Bio2 - Miasma - Bio setup open, I am reaching the same consistently with this build: http://ffxiv.ariyala.com/PZI3. 369 is the lowest I usually wind up on. Highest was probably 378-380ish on a crit friendly run. It tends to stay in the 370-375 area subject to crits.

I will try the different opener to see if it helps, but it's hard to imagine that changing my order of casts and not getting that second Bio under Raging Strikes would actually increase my DPS.
I can understand that you would do much more damage than me considering your gearset.

Sunako - http://ffxiv.ariyala.com/QEWG
Judge - http://ffxiv.ariyala.com/QGDR
HavenChild - http://ffxiv.ariyala.com/PZI3

But Sunako and I are nearly identical other than ~ 2% Crit Rate and I have more Spell Speed, yet they can pull amazing IMO damage. (*** I have to swap gear around for FCOB for accuracy till I get that stupid Casting Hat)

My Opener. Ifrit Placed next to the Dummy in a position where I don't turn away when using pet buffs)

Shadow Flare (activate AA near the end of the cast)
RS, B, Rouse/Spur, M (Crimson Cyclone), B2 (Flaming Crush), R2 + Fester + Enkindle, Ruin, Ruin, Ruin, B + Fester (waiting for ~1/2 before Fester so that Bio registers), Ruin, Ruin, Ruin, SC SF (fester + Aether Flow), M, B2

That's about it.

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Edited

Tried Opening with RS, B2, M, B, SC SF but the most I could get was 345 (SMN Only) just over 3 minutes.