Without the cheese (giving your own cities away): Easyist way by far to Losing my Marbles is a combo of completling the Exploration tree and having a big tech lead over the AI that founded (or conquered) the most cities. Can probably be done with standard size map, but easier with a bigger map.
It belongs in a Museum. Huge map and again complete Exploration tree. And you want enough of a tech lead to beat the AI here as well. And monitoring what ruins are available for tree and swapping to city state ones would save significant time.
A possible alternative is being a war mongler and try to capture cities from civs that are going after a going victory and capturing the artificats they've already placed in their museums.
For the Raiders of the Lost Ark, without cheese (playing hot seat as both the Germans & Americans), this may be really difficult if it triggers upon the dig finishing since the moment you get a unit on the tile, the AI will divert it's civilian units to a path that doesn't take it thru the tile.
It belongs in a Museum. Huge map and again complete Exploration tree. And you want enough of a tech lead to beat the AI here as well. And monitoring what ruins are available for tree and swapping to city state ones would save significant time.
A possible alternative is being a war mongler and try to capture cities from civs that are going after a going victory and capturing the artificats they've already placed in their museums.
For the Raiders of the Lost Ark, without cheese (playing hot seat as both the Germans & Americans), this may be really difficult if it triggers upon the dig finishing since the moment you get a unit on the tile, the AI will divert it's civilian units to a path that doesn't take it thru the tile.