With the exception of I thought Arrow S6 should be higher, and LOT S3 maybe higher, this list is so close to how I would have ranked it that it is eerie.

16.Arrow season 4 15.Supergirl season 1 14.Lot season 1 13.Flash season 4 12.Supergirl season 2 11.Arrow season 3 10.Arrow season 6 9.Supergirl season 3 8.Lot season 3 7.Flash season 3 6.Lot season 2 5.Arrow season 1 4.Flash season 2 3.Arrow season 2 2.Flash season 1 1.Arrow season 5

14. Arrow S3 13. Flash S3 12. Supergirl S4 11. Supergirl s1 10. Supergirl s3 9. Arrow s4 8. Arrow s1 7. Flash s4 6. LOT s1 5. Flash s1 4. Supergirl s3 3. Flash s2 2. Arrow s2 1. Arrow s5 Edit: I have not yet watched arrow s6 or 7, flash s5 or legends s2,3 or 4

arrow season 4 is worse then supergirl season 1 and 2

16. Flash 4 15. Flash 3 14. Arrow 4 13. Legends 1 12. Flash 5 11. Arrow 6 10. Arrow 3 9. Legends 2 8. Flash 2 7. Legends 3 6. Flash 1 5. Legends 4 4. Arrow 1 3. Arrow 7 2. Arrow 5 1. Arrow 2