Shanks basically has top 3 COO feat in the series so what are you talking about shishio??
1. Luffy talking to momo whiles unconscious
2. Sanji Sensing luffy and his awakening whiles passed out
3. Shanks Sensing gb from afar. Knowing he is a marine , sending his coc directly at him and then talking to him
4. Fuji Sensing the people of dressrosa around him
Now show me one COO feat of mihawk that beats any of the feats above. Muahahaha
These are really dog shit CoO feats tbh, "Sensing" Marines from far away, literally Zoro Sanji Jinbei did that too.
Rayleigh literally tracked the entire Island and power level of each animal.
But this is literal the craziest CoO feat in the series
Even average FS users like Katakuri need focus to use CoO, Mihawk is fully unfocused day dreaming and doing monologues about Luffy yet he is casually fighting a commander as strong as Marco.
If Shanks did that he would lose another arm. There is no way Shanks is pulling a feat of this caliber.