To me it makes no sense to do 2 plants or 6 plants or whatever. You do 1 or you do 4..
Keep it symmetrical.
Thatโs said, Iโd be doing it plant if youโre gonna main line youโre taking time to veg and 1 plant will fill up a 2x2 if mainlined - shoot for 16-24 tops.. usually lower growth you can top an extra time, giving you some extra tops.
If youโre gonna push more than 16 you better have environmentals on point, cuz youโre gonna have a lot going on in a small spot and can get WPM and humidity issues..
Iโd go one plant 16 tops. Youโll be able to flip after 6-8 weeks if you grow decently. Good luck