[quote=@Beloss]
This is true, I withdraw my argument from this angle. Now that some of these characters are posting however, one just a few minuets ago, and that they opened fire as expected, I would like to submit that this was a simple case of dropping the ball twice, rather than malicious intent to leave Rostam unsupported. I can talk to these other players if you want. 
[/quote]

Whether there was the intent to post or not is irrelevant. The rules state that if you don't post in a timely manner, events will progress without you, and I provided ample warning that this would happen in this specific circumstance. If you believed that Rostam would not move forwards without supporting fire, you should have spoken up asking people OOC if they were posting. 

At this point, it's after the fact. 

[quote]Does prana bursting give you some kind of armor or something? I thought it was just to increase your physical attributes. If I had known that I would have done it.[/quote]

Prana Burst is what allows the Phantasm Races to, at least in strength, overpower Servants. An all-out attack of a Phantasmal Beast, while weaker than the Jewel Sword's light, would at least have been comparable enough to offset it such that it could have been survived.

[quote]I appreciate your commitment to cannon, but plenty of RP's say that and have subtly difrent interpretations of cannon, especially since it changes and expands over time, especially recently with these new grand order games, which I have not played.[/quote]

That's all well and good for those RPs. I operate off of canon mechanics. If something is ambiguous in canon and I'm forced to assume a specific interp that may differ from others, then I will either disclose it or try to keep it distances from character death decisions. When new mechanics are introduced, they are incorporated. However, it has been a constant since around 2004 that Phantasmal Beasts don't break the sound barrier.

The effect Grand Order has on canon is widely overstated and perpetuated by people who haven't read it. Very few things in canon are ever changed, and what people perceive as retcons are almost always just introduction of new ideas.

Either way, this point is moot, since it's not as if it has applicability to this specific situation in any regard.

[quote]Right, but the oncoming prana blast is moving at a speed which is fast enough to threaten him. Regardless of how fast he can move, performing those extra actions slows him down enough to matter in relation to anything that's fast enough to hit him in the first place. Dismounting is not commonly regarded as a free action, something I feel is pretty universally recognised. This is one of a mounted mans great weaknesses actually, commonly used by more agile footmen to kill them, and if I had used similar logic to dodge something like an oncoming sword thrust or arrow, there would be justifiable outrage.[/quote]  

But given that, at its best, Rakhsh is moving at 1/8th of the burst speed that Rostam can reach, the fraction of a fraction of a second spent dismounting doesn't amount to much. 

Besides that, if anything all you're really arguing here is why one of your ways out would have killed you. Even if I were to say you were right here, that doesn't give me a reason to change what's happened. If there was no viable way for you to survive the light, which there certainly was, that still would be my ruling since this is the decision you made, to charge headlong at an enemy who had proved himself able to deal with Servants and who was channeling an absurd quantity of prana.

[quote]I was aware of this rule before posting. Just because a phantasmal beast is slower at does not mean that Rakhsh is required to be to slow to pull off the desired objective in this case. Especially when I accounted for that in having him sprain his leg from turning faster than a Phantasmal Horse normally would.

It is plausible in cannon that it could have been done. I would like to renew my request that Rostam is not ruled dead at this awkward early stage in the game, where it would not result in any breaking of cannon rules, where it would make for extreamly bad storytelling, and where it would sink a huge amount of my personal time investment into your excellent RP. 
[/quote]

The fact is that the gap in speed is too significant to ignore, when one is considering that Rostam was charging at NAGATO at this time, and that Rakhsh's speed is far inferior to Rostam's, let alone NAGATO's. The fact that you had Rakhsh sprain his leg doesn't mean anything, because he simply cannot move quickly enough to get out of the way of the attack. 

In sum, here are your remaining points. 

-[b]The supporting fire of Archers was not taken into account.[/b] This falls simply because, regardless of whether there was intent to post or not, the players of those Archers made no effort to inform me that they planned on posting despite receiving a warning that the roleplay was moving forwards. 
-[b]Canon is ever-shifting.[/b] While canon might be expanding, the core mechanics have not changed in the past two decades. Moreover, the important point here, namely the speed of Phantasmal Beasts, has not been changed and can be viewed front and center on the profiles of the first two Riders we'd ever seen in canon, Medusa and Iskander. This is not an obscure nor ambiguous piece of canon knowledge, and reading the profiles of at least one of those Riders would have been assumed to have happened, especially if someone is apping a similar mount.
-[b]Dismounting time would make that approach to dodging infeasible.[/b] See above. Moreover, even if this is the case, that's no reason to reverse the death decision, that simply means the odds were more stacked against you do to your decision. 
-[b]Rakhsh should be able to dodge.[/b] You've given no justification for this, only saying things like you took into account it would be difficult with the leg-spraining angle. That does nothing for the fact that Rakhsh is not fast enough to dodge. 

In the end, you're not giving me any true reason why I should reverse the decision. You're appealing to things which aren't relevant to the situation at hand. I understand your annoyance, and make no mistake that if you want to, the application of a new Servant is certainly possible, but I haven't been given an actual argument for why, in the logic of the IC and given the posts we had available to us, Rostam should be alive.