I think Khepri Head is in a similar boat to Thaumas Head(Think even Thaumas Hat would be better than Khepri...has less STR but 4% Crit)
The *** are you babbling about?
I know someone has already asked about Athos's Tabard for Chant du Cygne in place of Toci's, but it was paired with Ocelomeh Headpiece +1. So I was wondering if pairing Athos's Tabard with Khepri Bonnet would make a difference?
Simplified, the comparison is:
Toci/Ocelomeh: 1STR, 10 att, 3DA, 3TA
Athos/Khepri : 1DEX, 10 acc, 5%c.dmg, 3%c.rate
I'm going to assume you're using Myrmex hands, Athos legs, and Thaumas feet given the stated 3% critrate bonus. With that configuration, I have Athos/Khepri coming out slightly ahead of Toci's/Oce +1 even with uncapped Ratio. fSTR and WSC did not change with the stats I used, but if anything that favors the Athos set since it's more likely to get that 1 extra base damage and isn't subject to stat capping.
With Khepri legs the Toci's set pulls ahead again in uncapped fSTR/pDIF situations, but those are rather difficult to come by right now. Thaumas Hat is noticeably worse than any of the above options.