Interlude is the most popular Lineage 2 chronicle on private servers: the final Chronicle 6 update, before Kamael, with a well-known class balance, Olympiad, Seven Signs and castle sieges that players still know by heart.
Mid-rate Interlude (x11–x100) is the classic "evening" format: you reach 76 and third profession in a week or two, S-grade still has value, and epic bosses like Antharas and Valakas decide which alliance rules the server.
Interlude servers in this rate range right now: 6, 2 of them opening soon. VIP projects come first, then servers are ranked by player votes this month.