I don't understand the SMN hate. The video you posted literally shows you answers to them. Snipe is an instagib with BH4 or higher, or with pretty much any BH plus a followup Drill (doesn't need to be analyzed.) MNK can already 100-0 any caster in the unbreakable Meteodrive combo, it requires even less (or can be done even if they are guarding) with BH. NIN can poke at range and then chain neck snaps together to rapidly hit BH5 and begin slapping SMN for about half their HP with Hyosho every 15 sec. AST/SCH buffs fuzz the math even more.

Yeah, Bahamut spam is dumb but as long as you aren't all clumped up it's really not a huge deal. And if you *are* clumped up, you deserve to get dumpstered by AOE spam.