Hi, maybe once you can add a pack with the top generals like:
- Sylvana + Older gemini for 10k - 12k gem (limit 4-5)
- Boris + Older + Vargus - 15-17k gem (limit 4-5)

or sometimes a rotation for generals and magnificient buildings (temporary, each week or each month 1 from them with 1 limit then rotation and next week different building/general, only from the exclusive ones, which not permanently there already)

Or sometimes discount to the 4-5k gem explorers (similar like above, 1 limit, with 30% discount and each week in rotation or month)