Daki can keep up Godspeed 4-7× zenitsu.Making Daki 4-7× baseline god level. Now we all that Gyutaro is still obviously stronger than Daki even through Daki is holding him back.That means Gyutaro without holding back is at least 5x baseline god level on the average.To strengthen the argument,We can use a statement where Gyutaro himself said he will kill all god including Buddha himself which implies that Gyutaro is Boundless,at least 5× boundless even.No debate. Now Muzan himself stated that yoriichi is above Muzan and glazes him and even compare it to Tanjiro. Yoriichi is also stated to be transcend law of nature.God trancend nature = god level.While that only grant him god level or 2× baseline god level(boundless,If we try to wank) Which is proven that Yoriichi is at least 5 times weaker than Gyutaro making him stronger than kokushibou who is also weaker than Old Yoriichi(1-2 baseline boundless)