When do you think Dycedarg decided on it?
Been going back through the narrative of FFT for research and when coming back to the scene of the standoff at Ziekden I am reminded of that one bit from Breaking Bad, "can't you see he's made up his mind 10 minutes ago?" Like, I get that the whole point of the scene is to show how cruel and uncaring Dycedarg (who is a stand-in for Ivalice's aristocracy in general) is of the lives of the small folk, but it still strikes me as kinda odd that he seemingly waits to order Argath to take the shot, as if he were actually weighing whether or not he should actually call for it, only to decide "yeah, this is the best option in my best interests right now" after Ramza and Delita show up, but before the messenger informs him of Wiefgraf's movements (although we can assume that he was at least expecting to receive that news and was therefore in a hurry to not tarry there too long.)
Like, if Dycedarg decided Tietra’s life was worth sacrificing either when he first saw the corpse brigade's man walk out of the fortress with her (we don't see this happen, but I'm assuming that's something close to the sequence of events that went down at one point because don't we see any corpses on the battlefield and standing out in the open with your hostage held out in front of you where anyone could shoot you before you have a visual of how many of them there are and their positioning kinda defeats the whole purpose of having a hostage/human shield) or before he'd even arrived at the fortress, then why go through the theatrics and motions of listening to the suicide-bomber's bluff (I assume that Dycedarg believed that it was a bluff and that there were no more people within the fortress, if he wasn't outright certain of that, due to the fact that any corpse brigade men still inside would very likely immediately commit to the suicide-bombing bit (potentially endangering Dycedarg himself, as well as his troops) if they saw their trump card get mercilessly one-tapped by the very people Tietra was supposed to be a human shield/bargaining chip against + the fact that prematurely killing your hostage before you've made your escape is maybe the fastest possible way to get an express ticket into the ground) and then verbally shouting up, across the field back at the guy making the bluff with the equivalent of "we don't negotiate with terrorists?" Playing the devil's advocate here, if I were in Dycedarg's position and I'd already decided that Tietra was worth sacrificing (assuming that Dycedarg had made up his mind the second he saw her brought out of the fortress) then I would've ordered Argath to shoot while the corpse brigade's man was still mid-sentence.
Edit: I mixed them up, it's Zaalbag, not Dycedarg. Listen man, these names are hard, lol