I guess there is not much for us to win by warring the mayans, so I'll try and cool it off with them and then throw everyone at war with Tokugawa. I hope.
50 BC Persia has but one city left, so I "gift" them engineering for the 6 gold they have left. Max amount of shields we can output is not enough for colosseum in 4 so I give us what spare food we need so it'll be instant growth in due time. Attack all Mayan troops by our border, no promotions
IBT Xman has been genocided.
30 BC Peace with Smoke-Jaguar gives us 12+2gpt. Not going to let him waste troops on us that could attack a Samurai. Send workers to barricade our square by the ONLY Japanese Iron. We'll want that square bombed in due time.
30 AD Troops are now healed and reassigned to the japanese front. All spearmen and pults are backed in Amsterdam for upgrade potential. The Mayans are too dumb still to road up to us, and they want a pile of cash for a ROP, so we still depend on the Japs for trades, and we have 5 more turns of ongoing trades with the other civs than turns of forced peace with the japs.
50 AD Amsterdam Colosseum->Trebuchet. MM some tiles at sea for more gold, we can spare some shields. Japs have learned Invention and traded it to the mongols.
70 AD Japs start on copernicus

IBT Mongols declare on the Japs.
90 BC Amsterdam Trebuchet->Trebuchet
IBT Mongols get Knight's templar
130 BC msterdam Trebuchet->Trebuchet
4 more turns to our peace with the Japs. We still have no iron to upgrade to Swiss Mercs and get golden age. While in golden age it'll be possible to run a 40 spt MDI pump, or a 2 turn Knight pump, so getting GA asap is an option we need not overlook, as those units could deal a good bunch of damage to our buddies in Japan and prevent them from world domination, if our Mongol friends do not breach them with Keshik and templars. That's my 2 cents.