Use only one of these - Vampires start attacking at level 19, Dawnguard questline starts at level 20

Use only one of these - Vampires start attacking at level 29, Dawnguard questline starts at level 30

Use only one of these - Vampires start attacking at level 39, Dawnguard questline starts at level 40

Use only one of these - Vampires start attacking at level 49, Dawnguard questline starts at level 50

Use only one of these - Vampires start attacking at level 59, Dawnguard questline starts at level 60

Use only one of these - Vampires start attacking at level 69, Dawnguard questline starts at level 70

Use only one of these - Vampires start attacking at level 79, Dawnguard questline starts at level 80

Use only one of these - Vampires start attacking at level 89, Dawnguard questline starts at level 90

You can use this with any of the Dawnguard Delayed esps above or even on its own. Stops vampire attacks in towns, vampires outside cities and towns still attack.