Sasuke's Kirin and Lightning Jutsu
There's more to take into consideration for the verse as a whole than just the Biju Bombs. A very important technique in
Sasuke's arsenal is
Kirin.
Kirin has been gone over enough times in this wiki's history that I'm sure almost all Naruto fans here will be familiar with it but I'll provide an overview of it just to illustrate my point at how the speed ratings we've introduced contradict the narrative.
After exhausting his chakra on Orochimaru's substitution technique and several fireballs he fired into the sky, Sasuke reveals that he has one last technique up his sleeve despite his lack of chakra.
He used the fireballs to create stormclouds above, and he's going to use them to create a technique that 'lasts an instant' and 'cannot be blocked or evaded'. Sasuke doesn't supply his own chakra to power or speed up the technique (he can't; he's out of it as confirmed by Itachi); he just takes advantage of the enormous ambigent atmospheric energy to launch a Lightning Style jutsu by harnessing natural lightning. As Sasuke himself explains,
the jutsu guides the lightning striking down from the clouds at a target of Sasuke's choice; he merely directs natural lightning towards Itachi.
This is the reason why Kirin cannot be evaded, according to Zetsu. It's speed enabling it to cross the distance in 0.001 seconds.The
currently accepted calculation for Kirin's speed is
Mach 8089, using that timeframe from the manga.
If a
Massively Hypersonic+ attack (several hundred Mach off of being Sub-Relativistic) travelling across hundreds of meters is considered to be nigh-undodgeable by not just one but two sources commenting on the speed of the technique making it impossible to evade then a few things about the way we rank speed ratings on the wiki don't make sense and directly contradict the information presented to us in the primary source of the series.
Characters like the Sannin (who Sasuke and Zetsu are more than familiar with) aren't going around fighting at FTL speed. Jutsu like the Biju Bomb (which multiple characters have blocked or evaded) doesn't make sense being FTL if an MHS+ technique is considered impossible to evade.
While it is true that Sasuke's knowledge is limited; for example he was unaware that Itachi possessed the
Susano'o that he could use to block the Kirin, and he is unaware of the speed of the upper echelons like Minato who could use the
Flying Thunder God technique to teleport out of the way, the statement still remains a strong barrier for the vast majority of shinobi.
Lightning speed jutsu is never considered to be a joke in the series. The databook for Kakuzu's
False Darkness jutsu states "
It is exceedingly difficult to dodge a lightning bolt flying at high speed." Even in the final arc of the series
Madara employs realistic lightning bolts created through Yin Release to attack Naruto and Sasuke. Whilst though both Naruto and Sasuke quite capably react to it without issue, it shows that it is still a potential threat.
This is why it is very hard to accept that most characters are regularly fighting at FTL speeds, or that someone like Kakashi is
over twice as fast as Kirin is. By Hidan scaling to Kakashi, and Shikamaru scaling to Hidan, we end up in a scenario where Shikamaru is actually 6.3 times faster than the attack that blitzes him. If we go with the current FTL proposals then we end up in a situation where Kakuzu is "
FTL, with
MHS+ attack speed", and an
FTL Shikamaru was helpless as an
MHS+ attack crossed dozens of meters to reach him. It is too contradictory.