Dispensers of fiery explosions, light me up... with your ideas for BLM in 5.0

[Archwizard]

He sealed it away because he couldn't beat it,

He was also alone, having just fed his fellow disciples to it at the time and instantly regretted that decision.
Backup dancers or no, we'd just revived the order of Black Mages.

And again, we never actually saw him fight, so it's impossible for us to measure how strong he was by comparison to ourselves, other than that you're overhyping his ability to mind-alter "the entire city" (which in reality was probably no more than a dozen Lalafells), nor what he can do by comparison to over a dozen Thaumaturges.

Shatotto could, but she also casually cast what we consider our limit break, and makes it very clear we pale in comparison to her in her prime.

But more importantly, aesthetics aside, considering we're still arguing over whether we can fit Thundercloud into Astral Fire or do more in Umbral Ice than cast Foul, where exactly would such attacks fit into our kit? We already have a DoT that we already don't do enough with.