I'm going to compare the total potency over the opening 45 seconds of some popular rotations.
1. Official forum SMN thread (
http://forum.square-enix.com/ffxiv/t...Summoner-Guide)
Messy guide, but at the end is a rotation.
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2. Reddit's "Summoner: an Extensive guide" Sleigh's Opener (which refers to here) (
https://docs.google.com/document/d/1...FJWVSKlvU/edit)
A 66 page guide and discussion on Summoner
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3. My opener (VIDEO:
https://www.youtube.com/watch?v=MqVzR1G8Vww)
The difference with my opener is that I squeeze in 2 festers within trance, but this makes me have to wait for fester to be off cooldown meaning that my "burst" is 10 seconds behind.
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Conclusion
Sleigh's opener seems to be superior to the official forum opener, as they have the same "burst" time (both enter trance at 15s).
I can't tell how my opener compares without extending the duration beyond 45s, but you can see that there is a lot more potency remaining at the end from DoTs, while the potency at the end of the 45s is still comparable.