Very good basic BLM guide. I would argue Mega INT and Mega Either (players picks one) should be there added to the list, they are both core on BLM (pick one). I would also suggest adding more information on Thunder. II is not always better than III/I.
As for the BiS, while I do agree with it and it is what I use, others would say SS BiS is better. They are not wrong and it should be added as a second option for BiS.