Answering my own question - Rifles (and collateral) are the best defence against Cossacks 
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Your estimates of Constitution EOT179, Democracy EOT181/182 and Corporation EOT183 sound reasonable - I was being a bit lazy and was going to check with Oxford in place
. We need to put two turns into a Grenadier in Zucchini (t177 and 178), then could put a turn (t179) into a Musket there before whipping the Cuir t180, the Grocer t181 and starting the SoL t182 and then whipping the Gren and Musket at intervals. (If we can't squeeze out Democracy t181 then we put two turns into the Musket instead of one.)
BGN got rifling this turn, I forgot to check on how much cash he had, but average global rival power went down so I don't think he mass-upgraded Cossacks. What would it take from him to make you want to get RP-Rifling before Corporation?
. Your estimates of Constitution EOT179, Democracy EOT181/182 and Corporation EOT183 sound reasonable - I was being a bit lazy and was going to check with Oxford in place
. We need to put two turns into a Grenadier in Zucchini (t177 and 178), then could put a turn (t179) into a Musket there before whipping the Cuir t180, the Grocer t181 and starting the SoL t182 and then whipping the Gren and Musket at intervals. (If we can't squeeze out Democracy t181 then we put two turns into the Musket instead of one.)BGN got rifling this turn, I forgot to check on how much cash he had, but average global rival power went down so I don't think he mass-upgraded Cossacks. What would it take from him to make you want to get RP-Rifling before Corporation?
Completed: RB Demogame - Gillette, PBEM46, Pitboss 13, Pitboss 18, Pitboss 30, Pitboss 31, Pitboss 38, Pitboss 42, Pitboss 46, Pitboss 52 (Pindicator's game), Pitboss 57
In progress: Rimworld
In progress: Rimworld