From
this thread, i guess this
ftl+ calculation was eventually become "hiding calculation" Just like byasura ever said in
here. Even though i don't think I'm sounding anything to fool people in those calc. But after i think it again, i guess it's still unusuable due too much asumption got stacking rather than actual that canonly has statement/canon perception (which is in this case was arthur not really got blitzed, just mere surprised, and tristan not really have actual statement for being comparable in speed with other that has sol speed unlike lancelot and percival that have it).
So i think calculating macduff that was blitzed percival more make sense and valid rather than this circular asumption.