This is why, on turn 4, that I am at 26% while everyone else (including the SMN) hovers around 19-21%? lol Clearly SMN isn't better on turn 4 than a BLM if you seek maximum damage through job mechanics.
Sorry but it seems you do not play your BLM as well as you think.
There is absolutely no reason a SMN will ever beat a BLM in turn 4. Ever. I AoE things down so fast that your DoTs do not even have a chance to run their full duration. Given that double flare is still viable and is actually the optimal AoE rotation now, there isn't a way for a SMN to keep up in short term AoE instances as seen in turn 4.
Same story with Titan egis. You will not have a chance to apply your full DoTs before I have flared them twice (including Titan) and lined up my 3rd flare for the finisher.
Any fight with AoE that is longer than 30 seconds is pretty much T5 snakes...which I destroy SMNs in regularly. You can bane all you like but when I am chaining flares back to back it doesn't do much for you.
Less, of course, you were unaware of how to properly use BLM AoE:
https://www.youtube.com/watch?v=82L9IbUPMxU
As a BLM who has been playing since release, running turn 4 since late September, and running turn 5 weekly since mid November, I often find that the populace of BLMs who think they're 'good' at the job are, in fact, not.
Given that, I still have not seen pants from turn 4, my Allagan weapon, or any caster drops besides what you see on me. Yet I still run circles around SMNs with Allagan weapons and BiS gear in Titan Ex.
To be specific: he has Allagan book which is more weapon damage than my Elder Staff (huge), he has Allagan body (pure DPS) where I use AF2 body (contains ACC), and has the advantage when it comes to a movement-intensive fight. However, the results are pretty clear:
http://i.imgur.com/SuF85aj.png
I find I'd rather be using my SMN (if I had the Allagan gear) on turn 1 and MAYBE turn 5. As of tonight, I finally outparsed my FC mate who has full BiS gear on his MNK while on my BLM by playing super aggressive and altering our LB phase slightly. I'd rather take 1 BLM to T5 for lethargy.
And looky where the SMN is (he also has Allagan weapon):
http://i.imgur.com/sSObG8Y.png
That parse includes me using the LB instead of the SMN (where, if he had used the LB, I could have pushed out much more DPS than I did). BLM AoE shines in turn 5 pre-Twin and on both snake phases.
As I've said: most people do not know how to play BLM so why bother trying? Go with the easy class and leave the class more dependent on min/maxing to the more skilled.
Edit: Honestly, after looking at your SMN, you can disregard the above. These situations do not apply to you.