BLM

[Starkbeaumont]

Isn't that good? You get a 20% dmg buff and access to Straight Shot that gives 20% crit chance for 20 seconds. Isn't this good for DPS?

no straight shot for DoM. you get Raging Strikes (good), Hawk's Eye (useless if skill discription is correct) and Quelling Strikes (can be good)

[Coralfang]

no straight shot for DoM. you get Raging Strikes (good), Hawk's Eye (useless if skill discription is correct) and Quelling Strikes (can be good)

Oh, no straight shot is really a shame.

[Sylkis]

In p3 I did an in depth analysis on THM/BLM and posted it in general (it was called BLM testing and analysis).

There were 2 types of rotations and they had the same output. The difference between them was:
-... Blizzard 3 > Thunder 3 ...
-... Transpose > Thunder 3 > Thunder 2 ...

Now since you can only use one thunder at a time(and so thunder 2 is useless), it seems that Blizzard 3 is the way to go. Transpose regen would be too slow now that you have nothing to fill the "gap".

The Blizzard 3 rotation goes like this:
Fire 3 > fire 1 until ~500mp > blizzard 3 > thunder 3 > (repeat)
You can start from thunder 3 if you want to.

____
One last thing that I want to do is see if thunder is stronger than fire(they were about the same in p3). If it is, thunder would be the first spell to cast. Will edit results into here later

On average:
Fire I with Astral Fire III and considering Firestarter: 122.4 P/s (428.4 Potency, 3.5s)
Thunder III considering Thundercloud: 123.1 P/s (587 Potency, 4.77s)

Looks like they are around the same once again.