I don't see it mentioned anywhere else, but another reason to never forget your Bane is if your group is mass-sleeping mobs, Bane will spread the dots without waking the mobs up. Same with Tri-diaster, you can spread the dots to binded mobs without removing the bind.

Also, having done AK with every other DPS class now, and failing the Demon Wall only once with a healer who hadn't done it before getting blasted off the side at the first repel, SMN is fully capable of rocking that fight. Especially with Ifrit-egi when he gets stuck behind the wall and just keeps wailing on it :3