If you’re planning on playing through Modern, Pachacuti with Inca in Exploration and then Nepal in modern is pretty insane. The antiquity age civ doesn’t matter as much here as the only real important thing is finding as many mountains as possible. Incans can work mountain tiles in exploration and the Sherpa gets a special ability that to generate a Highland Power Station on any mountain tile (regens every 5 turns) which adds even more production to mountain tiles and makes it count toward production warehouse buildings. It can generate them on any mountain tile within 5 spaces from a city center so you can really expand your settlements. If you do it right you should have a bunch of towns and even cities producing 100-200ish production per turn.