You may have to link me this to talk about a 5B OS parry as I know I didn't see it but some of the commentators could understand Satoshi well enough if he mention it. Another possibility though is that their mentioning using parry right after 5B got blocked or even IB since parry would beat anything outside of command throw and low in the situation while allow you go back to pressuring if they don't react.
As for orb oki Haku is the only one, but it's a worth mention that Rachel can wind out it and punish you if you whiff something before she lands.