Scardrac
Felsummer
It increases workload to have personalized events for groups but I think it works best that way. When there are several groups, there are more theories and stories and experiences. You can gain inspiration from each one and host unique events that way, and satisfy the ideas of the players, making them feel like theyre making an impact. When everyone just bundles up together in one massive group then things become normalized and you may have to shoehorn people in the right direction, and individual theories/interactions may be overlooked in favor of others. When things come to their climax, groups will naturally come together, and you can do your big “you dont want to miss this” events.