[quote]Strength: A Endurance: B+ Agility: A Mana: C Luck: E[/quote] 

Strength to B. Base A STR isn't something that even Rostam should get, it takes Draconic Prana Burst for a Servant to hit that tier. Even Herc, summoned in Western Europe with Ilya as a Master, has B as his rank, and Rostam's strength is solidly below Herc's. 

Agility to B also for similar reasons. 

Class Skills are fine.

[quote]Instinct Rank: B The ability to sense favorable outcomes through a sixth sense of sorts. At the rank of B+, Rostam is able to effectively deduce the threat level of his opponents, readily see through most visual obstruction, and instinctively understand the success rate or failure of his attacks before they are performed.[/quote]

Is it B or B+? If B, you should take the description from Mordred's. If B+, take the description from Mordred's and then add what the modifier does.

Also, you need to justify this. Citations of Rostam "feeling" the most favorable route in combat. Combat experience or being good at combat won't cut it, those are things like EotM. Instinct is the plot skill, you can't really justify having it, so this'll be hard to keep.

No objections to Bravery. Battle Continuation at A is iffy, but I'm fine with it. 

[quote]Rostam must also be at least five meters away from the opponent[/quote]

Change the minimum range to 2, then. A range of 1 is less than five meters, even if the range scale isn't numeric.

B+ seems a bit high for what's just a speedblitz technique. You can rank it down to B, that won't change the damage output but at least using it once won't burn up all his prana in one go.

The passive capability is kind of pointless though. Eternal Arms Mastership means you can fight under Mental Interference. Bravery nullifies Mental Interference so it never affects you, so it makes having a passive EAM pointless. You can keep that there, just know it doesn't do much.

Haft Khan is more eh. The "C and under is negated, above C has C subtracted from it" is a no-go on face. Damage Threshold abilities like that are quite blatantly why Siegfried's banned. You can have other defensive abilities, but Damage Threshold is too broken. The active effect of it is like Saint George's NP but times seven, and frankly the "nullify any attack once" thing isn't something I'm comfortable allowing in that amount. I'd be more receptive if this had a higher grounding in the legend, that this was actually what had happened and he had a divine protection of this caliber that gave him such a peerless invulnerability, but without even that I'll have to say no. 

That's made worse by the fact that even Herc , Siegfried, and Karna, who were all given protections that were "100% no exceptions impenetrable" in their real legends have protections that you can inflict damage through in the Nasuverse, so having someone who didn't get a protection of that tier in his legend get a protection beyond that tier as a Servant seems to be fairly contradictory.

That said, Rostam's one of those heroes with plenty of NP-worthy things, so you should be able to find suitable stuff for him without having to resort to digging too deep into wank. But yeah, you'll either have to scrap or heavily rework that NP. I'm fine with helping you work other stuff out, if you hit a snag.