With all the candidates dropping to avoid 3 ways with RN, the estimate for them seems to be maxing out at 240 seats out of 577. RN already talking more about option 2.As @Liu Kang said, it's mad complicated lol
Basically,
1) Far-right gets 50% of the seats +1 => absolute majority and their own Prime Minister, who will name most of the other ministers. At this point, the Far-right can basically do whatever they want, except what's unconstitutional... But from their own admission, they plan to destroy or limit the Constitutional Council charged to block unconstitutional laws.
2) Far-right gets less than [50% of the seats +1] but more seats than other groups => relative majority, so to make a law pass, they're forced to make alliances with other groups (or try to force it through with executive orders which is not appreciated).
First scenario is terrible, 2nd scenario is very bad because beef runs so deep between the different groups that alliances may be impossible, making the country impossible to govern (in the sense of making laws pass) for a full year at least (up until Macron can dissolve the Assembly again). This would increase the risk of tensions, that are already high, ramping up.
I watched a show today that said that Macron may even accept a RN PM, if they have 260 instead of 288 seats but that looks very unlikely right now. We never know but if they score lower than 240, they would greatly be limited but I don't know how the government will work lol