My point was that you are making an assertion when it is clearly a matter of interpretation. Your isn't incorrect, but it isn't univerally correct either.Well, I wasn't cherry picking as you seem to think, I was only pointing out that, even though each dart deals damage, it all hits at the same time. That was my point. Like my falling example. If you fall you will very likely suffer multiple injuries, even if minor, which would all be damage. But the game groups it all into one total.
If the PC is that close to death (or an NPC that gets death saves) I would roll each die individually one at a time. I agree that it would be bad form to roll all the damage and then apply the numbers in a way that creates a specific outcome. I also roll all attack rolls, damage rolls and saving throws in the open all the time because that is how I do things.Do you tell a player hit by multiple magic missiles the damage they take from each separate missile, or just tell them the total?
For example: a PC has 8 hp left and is hit by all three missiles (which we know strike simulatenously). You roll damage and get 3, 5, 2 total. If you say the 3 and 5 are applied first, reducing the PC to 0 hp, the last 2 would be an auto fail death save. But what if you told them the damage was 3, 2, and then 5? Well, now they are still at 0 hp, but no auto fail death save.