That's a lot of attacks.
But also... that AB looks pretty bad for a martial character.
I understand that's without buffs, but still.
I guess you can always hope to roll some 20s.
I, perhaps, should have mentioned it before, but I'm pretty sure the image is already factoring in the penalties from cbt. expertise (-5), pwr. atk. (-5), and def. instance (-4). So the real max AB is quite a bit higher.
And, as you mentioned, rolling 20s is a thing and, thankfully this being a party-based game, among all the AOOs from things like Trip, Outflank, Seize the Moment, and whatnot, from the sheer volume of attacks alone you can beat most encounters. A Bard on Fascinate can help a lot when it comes to controlling the battlefield.
Of course this is no Sword Saint with a dip on Monk, but, you know, not bad for a random ride.