bonafide11
Worker
Sitting Bull of China and research metal casting fast to get a great engineer, lightbulb machinery... and watch your cho-ko-nu destroy the praetorian!
If she's real close, Cyrus of Inca would be good for a quechua rush. Quechuas already have combat 1 so agressive civs wouldn't be good. Cyrus is charismatic and imperialistic, so you'd be able to get an early GG, and get some promotions for your quechuas quickly when combined with charismatic.
If it's impossible to stop her getting the preatorians, Daruis or Lizzy of China would be a good choice. Crossbowmen are the easiest really effective preatorian counter to get to, so some early Chu-ko-nu would have Boudica pissing in her pants.
Everyone is saying rush her, but what if u could pull off a feudalism slingshot? You would be safe in defence and then could quickly tech to crossbows/maces while her economy crashes.
Cho-ko-nus don't even come from the same era and against a praetorian army rush you would be dead before you got crossbows. Cho-ko-nus are average UU. They are too specialized and are not a game breaking unit type like praetorians or panzers are.
You only need Bronzeworking, Metal Casting, Pottery and Machinery. You have to do a bit more researching than Boudica does, but if you focus your strategies towards it..... it can be easily done.
Anyway....... Panzers game breaking? Noob.
You also need IW as Cho-Ku-Nu needs iron to build.
But to claim CKN cannot be game breaking certainly hasn't seen the full power of this unit. With the toning down of seige weapons, CKN is the only early unit that is able to inflict collaterals and kill. Stacks of combat based CKN + Drill based CKN + a few spears are really hard to stop. The only issue is to get them early enough. In MP games it's not uncommon a team will include a Chinese leader and protect him till CKN comes out. In SP how to speed this process up without being rushed is a major problem though. In Vanilla Qin has financial and one can simply research it. After Warlord you have to pull the Oracle-MC gambit, which is not too reliable.
Rifelmen kill pratorians no matter who their leader is.
Modern armors also work quite well.