I guess today I downloaded a parser and I was quite shocked by things I saw / heard.

I was in Titan HM, I happened to be top by about 20 points at 160 dps, with a BLM at 145ish and our dragoons tailing behind just slightly lower than that.
However I was then told: "-Insert name here- is a summoner who does 350+ it's proven".

So, I went to a level 50 dummy and used my following rotation:
Previous stacked Aetherflow III
Shadow flare
Raging strikes
Bio 2
Miasma 1
Bio 1
Fester
Contagion
Thunder
Purge / Spur
Ruin
Fester
Ruin
Fester
Ruin x 1000 / refresh dots repeat rotation

The max I hit on the dummy was 225 when I looked back, with an average of about 210/215